diff --git a/CLAUDE.md b/CLAUDE.md
index 00c67af..f405c1b 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -99,5 +99,6 @@ Bitmaps emitted to `StateFlow`s are **never eagerly recycled** immediately after
 ## Known limitations / future work
 
 - `minSdk = 35` (Android 15) — intentional for personal use. Lower to 26-29 if distributing.
+- Accompanist Permissions (`0.36.0`) is deprecated; should migrate to first-party `activity-compose` API.
 - Dependencies are pinned to late-2024 versions; periodic bumps recommended.
 - Fragment shader uses `int` uniform branching in GLSL ES 1.00 — works but could be cleaner with ES 3.00.
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 26ef662..5e3c123 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -112,8 +112,8 @@ dependencies {
     // Location
     implementation(libs.play.services.location)
 
-    // Test
-    testImplementation(libs.junit)
+    // Permissions
+    implementation(libs.accompanist.permissions)
 
     // Debug
     debugImplementation(libs.androidx.ui.tooling)
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 7312d90..2fb4752 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -1,2 +1,5 @@
 # Add project specific ProGuard rules here.
 # CameraX and GMS Location ship their own consumer ProGuard rules.
+
+# Keep OpenGL shader-related code (accessed via reflection by GLSL pipeline)
+-keep class no.naiv.tiltshift.effect.** { *; }
diff --git a/app/src/main/java/no/naiv/tiltshift/MainActivity.kt b/app/src/main/java/no/naiv/tiltshift/MainActivity.kt
index 7a379a2..ab0cca3 100644
--- a/app/src/main/java/no/naiv/tiltshift/MainActivity.kt
+++ b/app/src/main/java/no/naiv/tiltshift/MainActivity.kt
@@ -2,15 +2,12 @@ package no.naiv.tiltshift
 
 import android.Manifest
 import android.content.Intent
-import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Bundle
 import android.provider.Settings
 import androidx.activity.ComponentActivity
-import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -29,24 +26,23 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import androidx.core.app.ActivityCompat
-import androidx.core.content.ContextCompat
 import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.google.accompanist.permissions.isGranted
+import com.google.accompanist.permissions.rememberMultiplePermissionsState
+import com.google.accompanist.permissions.rememberPermissionState
+import com.google.accompanist.permissions.shouldShowRationale
 import no.naiv.tiltshift.ui.CameraScreen
 import no.naiv.tiltshift.ui.theme.AppColors
 
@@ -70,47 +66,21 @@ class MainActivity : ComponentActivity() {
     }
 }
 
+@OptIn(ExperimentalPermissionsApi::class)
 @Composable
 private fun TiltShiftApp() {
-    val context = LocalContext.current
-    val activity = context as? ComponentActivity
-
-    var cameraGranted by remember {
-        mutableStateOf(
-            ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA)
-                == PackageManager.PERMISSION_GRANTED
+    val cameraPermission = rememberPermissionState(Manifest.permission.CAMERA)
+    val locationPermissions = rememberMultiplePermissionsState(
+        listOf(
+            Manifest.permission.ACCESS_FINE_LOCATION,
+            Manifest.permission.ACCESS_COARSE_LOCATION
         )
-    }
-    var locationGranted by remember {
-        mutableStateOf(
-            ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION)
-                == PackageManager.PERMISSION_GRANTED ||
-            ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION)
-                == PackageManager.PERMISSION_GRANTED
-        )
-    }
-
-    // Track whether the camera permission dialog has returned a result,
-    // so we can distinguish "never asked" from "permanently denied"
-    var cameraResultReceived by remember { mutableStateOf(false) }
-
-    val cameraPermissionLauncher = rememberLauncherForActivityResult(
-        ActivityResultContracts.RequestPermission()
-    ) { granted ->
-        cameraGranted = granted
-        cameraResultReceived = true
-    }
-
-    val locationPermissionLauncher = rememberLauncherForActivityResult(
-        ActivityResultContracts.RequestMultiplePermissions()
-    ) { permissions ->
-        locationGranted = permissions.values.any { it }
-    }
+    )
 
     // Request camera permission on launch
     LaunchedEffect(Unit) {
-        if (!cameraGranted) {
-            cameraPermissionLauncher.launch(Manifest.permission.CAMERA)
+        if (!cameraPermission.status.isGranted) {
+            cameraPermission.launchPermissionRequest()
         }
     }
 
@@ -120,47 +90,28 @@ private fun TiltShiftApp() {
             .background(Color.Black)
     ) {
         when {
-            cameraGranted -> {
+            cameraPermission.status.isGranted -> {
                 // Camera permission granted - show camera
                 CameraScreen()
 
                 // Request location in background (for EXIF GPS)
                 LaunchedEffect(Unit) {
-                    if (!locationGranted) {
-                        locationPermissionLauncher.launch(
-                            arrayOf(
-                                Manifest.permission.ACCESS_FINE_LOCATION,
-                                Manifest.permission.ACCESS_COARSE_LOCATION
-                            )
-                        )
+                    if (!locationPermissions.allPermissionsGranted) {
+                        locationPermissions.launchMultiplePermissionRequest()
                     }
                 }
             }
             else -> {
-                // Permanently denied: user has responded to the dialog, but permission
-                // is still denied and the system won't show the dialog again
-                val cameraPermanentlyDenied = cameraResultReceived &&
-                    activity?.let {
-                        !ActivityCompat.shouldShowRequestPermissionRationale(
-                            it, Manifest.permission.CAMERA
-                        )
-                    } ?: false
+                // Permanently denied: not granted AND rationale not shown
+                val cameraPermanentlyDenied = !cameraPermission.status.isGranted &&
+                    !cameraPermission.status.shouldShowRationale
 
                 // Show permission request UI
                 PermissionRequestScreen(
-                    onRequestCamera = {
-                        cameraPermissionLauncher.launch(Manifest.permission.CAMERA)
-                    },
-                    onRequestLocation = {
-                        locationPermissionLauncher.launch(
-                            arrayOf(
-                                Manifest.permission.ACCESS_FINE_LOCATION,
-                                Manifest.permission.ACCESS_COARSE_LOCATION
-                            )
-                        )
-                    },
-                    cameraGranted = false,
-                    locationGranted = locationGranted,
+                    onRequestCamera = { cameraPermission.launchPermissionRequest() },
+                    onRequestLocation = { locationPermissions.launchMultiplePermissionRequest() },
+                    cameraGranted = cameraPermission.status.isGranted,
+                    locationGranted = locationPermissions.allPermissionsGranted,
                     cameraPermanentlyDenied = cameraPermanentlyDenied
                 )
             }
diff --git a/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt b/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt
index 51d42ed..00f9107 100644
--- a/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt
+++ b/app/src/main/java/no/naiv/tiltshift/camera/CameraManager.kt
@@ -174,14 +174,24 @@ class CameraManager(private val context: Context) {
     }
 
     /**
-     * Sets the zoom ratio. Updates UI state immediately so that rapid pinch-to-zoom
-     * gestures accumulate correctly (each frame uses the latest ratio as its base).
-     * If the camera rejects the value, the next successful set corrects the state.
+     * Sets the zoom ratio. Updates UI state only after the camera confirms the change.
      */
     fun setZoom(ratio: Float) {
         val clamped = ratio.coerceIn(_minZoomRatio.value, _maxZoomRatio.value)
-        _zoomRatio.value = clamped
-        camera?.cameraControl?.setZoomRatio(clamped)
+        val future = camera?.cameraControl?.setZoomRatio(clamped)
+        if (future != null) {
+            future.addListener({
+                try {
+                    future.get()
+                    _zoomRatio.value = clamped
+                } catch (e: Exception) {
+                    Log.w(TAG, "Zoom operation failed", e)
+                }
+            }, ContextCompat.getMainExecutor(context))
+        } else {
+            // Optimistic update when camera not available (e.g. during init)
+            _zoomRatio.value = clamped
+        }
     }
 
     /**
diff --git a/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftRenderer.kt b/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftRenderer.kt
index d170d58..3258fa8 100644
--- a/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftRenderer.kt
+++ b/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftRenderer.kt
@@ -5,7 +5,6 @@ import android.graphics.SurfaceTexture
 import android.opengl.GLES11Ext
 import android.opengl.GLES20
 import android.opengl.GLSurfaceView
-import android.util.Log
 import java.nio.ByteBuffer
 import java.nio.ByteOrder
 import java.nio.FloatBuffer
@@ -13,16 +12,10 @@ import javax.microedition.khronos.egl.EGLConfig
 import javax.microedition.khronos.opengles.GL10
 
 /**
- * OpenGL renderer for applying tilt-shift effect to camera preview
- * using a two-pass separable Gaussian blur.
+ * OpenGL renderer for applying tilt-shift effect to camera preview.
  *
- * Rendering pipeline (3 draw calls per frame):
- * 1. **Passthrough**: camera texture → FBO-A (handles coordinate transform via vertex/texcoord)
- * 2. **Horizontal blur**: FBO-A → FBO-B (13-tap Gaussian, tilt-shift mask)
- * 3. **Vertical blur**: FBO-B → screen (13-tap Gaussian, tilt-shift mask)
- *
- * The passthrough decouples the camera's rotated coordinate system from the blur
- * passes, which work entirely in screen space.
+ * This renderer receives camera frames via SurfaceTexture and applies
+ * the tilt-shift blur effect using GLSL shaders.
  */
 class TiltShiftRenderer(
     private val context: Context,
@@ -30,30 +23,16 @@ class TiltShiftRenderer(
     private val onFrameAvailable: () -> Unit
 ) : GLSurfaceView.Renderer {
 
-    companion object {
-        private const val TAG = "TiltShiftRenderer"
-    }
-
     private lateinit var shader: TiltShiftShader
     private var surfaceTexture: SurfaceTexture? = null
     private var cameraTextureId: Int = 0
 
-    // Camera quad: crop-to-fill vertices + rotated texcoords (pass 1 only)
-    private lateinit var cameraVertexBuffer: FloatBuffer
-    private lateinit var cameraTexCoordBuffer: FloatBuffer
-
-    // Fullscreen quad for blur passes (no crop, standard texcoords)
-    private lateinit var fullscreenVertexBuffer: FloatBuffer
-    private lateinit var fullscreenTexCoordBuffer: FloatBuffer
+    private lateinit var vertexBuffer: FloatBuffer
+    private lateinit var texCoordBuffer: FloatBuffer
 
     private var surfaceWidth: Int = 0
     private var surfaceHeight: Int = 0
 
-    // FBO resources: one framebuffer, two color textures for ping-pong
-    private var fboId: Int = 0
-    private var fboTexA: Int = 0
-    private var fboTexB: Int = 0
-
     // Current effect parameters (updated from UI thread)
     @Volatile
     var blurParameters: BlurParameters = BlurParameters.DEFAULT
@@ -90,33 +69,27 @@ class TiltShiftRenderer(
     @Volatile
     private var currentTexCoords = texCoordsBack
 
-    @Volatile
-    private var updateTexCoordBuffer = false
-
     override fun onSurfaceCreated(gl: GL10?, config: EGLConfig?) {
         GLES20.glClearColor(0f, 0f, 0f, 1f)
 
+        // Initialize shader
         shader = TiltShiftShader(context)
         shader.initialize()
 
-        // Camera quad vertex buffer (crop-to-fill, recomputed when resolution is known)
-        cameraVertexBuffer = allocateFloatBuffer(8)
-        cameraVertexBuffer.put(floatArrayOf(-1f, -1f, 1f, -1f, -1f, 1f, 1f, 1f))
-        cameraVertexBuffer.position(0)
+        // Allocate vertex buffer (8 floats = 4 vertices × 2 components)
+        vertexBuffer = ByteBuffer.allocateDirect(8 * 4)
+            .order(ByteOrder.nativeOrder())
+            .asFloatBuffer()
+        // Fill with default full-screen quad; will be recomputed when camera resolution is known
+        vertexBuffer.put(floatArrayOf(-1f, -1f, 1f, -1f, -1f, 1f, 1f, 1f))
+        vertexBuffer.position(0)
 
-        // Camera texcoord buffer (rotated for portrait)
-        cameraTexCoordBuffer = allocateFloatBuffer(8)
-        cameraTexCoordBuffer.put(currentTexCoords)
-        cameraTexCoordBuffer.position(0)
-
-        // Fullscreen quad for blur passes (standard coords)
-        fullscreenVertexBuffer = allocateFloatBuffer(8)
-        fullscreenVertexBuffer.put(floatArrayOf(-1f, -1f, 1f, -1f, -1f, 1f, 1f, 1f))
-        fullscreenVertexBuffer.position(0)
-
-        fullscreenTexCoordBuffer = allocateFloatBuffer(8)
-        fullscreenTexCoordBuffer.put(floatArrayOf(0f, 0f, 1f, 0f, 0f, 1f, 1f, 1f))
-        fullscreenTexCoordBuffer.position(0)
+        // Create texture coordinate buffer
+        texCoordBuffer = ByteBuffer.allocateDirect(currentTexCoords.size * 4)
+            .order(ByteOrder.nativeOrder())
+            .asFloatBuffer()
+            .put(currentTexCoords)
+        texCoordBuffer.position(0)
 
         // Create camera texture
         val textures = IntArray(1)
@@ -141,75 +114,88 @@ class TiltShiftRenderer(
         surfaceWidth = width
         surfaceHeight = height
         vertexBufferDirty = true
-        recreateFBOs(width, height)
     }
 
     override fun onDrawFrame(gl: GL10?) {
+        // Update texture with latest camera frame
         surfaceTexture?.updateTexImage()
 
+        // Recompute vertex buffer for crop-to-fill when camera or surface dimensions change
         if (vertexBufferDirty) {
             recomputeVertices()
             vertexBufferDirty = false
         }
 
+        // Update texture coordinate buffer if camera changed
         if (updateTexCoordBuffer) {
-            cameraTexCoordBuffer.clear()
-            cameraTexCoordBuffer.put(currentTexCoords)
-            cameraTexCoordBuffer.position(0)
+            texCoordBuffer.clear()
+            texCoordBuffer.put(currentTexCoords)
+            texCoordBuffer.position(0)
             updateTexCoordBuffer = false
         }
 
-        val params = blurParameters
-
-        // --- Pass 1: Camera → FBO-A (passthrough with crop-to-fill) ---
-        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fboId)
-        GLES20.glFramebufferTexture2D(
-            GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
-            GLES20.GL_TEXTURE_2D, fboTexA, 0
-        )
-        GLES20.glViewport(0, 0, surfaceWidth, surfaceHeight)
         GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT)
-        shader.usePassthrough(cameraTextureId)
-        drawQuad(
-            shader.passthroughPositionLoc, shader.passthroughTexCoordLoc,
-            cameraVertexBuffer, cameraTexCoordBuffer
+
+        // Use shader and set parameters
+        shader.use(cameraTextureId, blurParameters, surfaceWidth, surfaceHeight, isFrontCamera)
+
+        // Set vertex positions
+        GLES20.glEnableVertexAttribArray(shader.aPositionLocation)
+        GLES20.glVertexAttribPointer(
+            shader.aPositionLocation,
+            2,
+            GLES20.GL_FLOAT,
+            false,
+            0,
+            vertexBuffer
         )
 
-        // --- Pass 2: FBO-A → FBO-B (horizontal blur) ---
-        GLES20.glFramebufferTexture2D(
-            GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
-            GLES20.GL_TEXTURE_2D, fboTexB, 0
-        )
-        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT)
-        shader.useBlurPass(fboTexA, params, surfaceWidth, surfaceHeight, 1f, 0f)
-        drawQuad(
-            shader.blurPositionLoc, shader.blurTexCoordLoc,
-            fullscreenVertexBuffer, fullscreenTexCoordBuffer
+        // Set texture coordinates
+        GLES20.glEnableVertexAttribArray(shader.aTexCoordLocation)
+        GLES20.glVertexAttribPointer(
+            shader.aTexCoordLocation,
+            2,
+            GLES20.GL_FLOAT,
+            false,
+            0,
+            texCoordBuffer
         )
 
-        // --- Pass 3: FBO-B → screen (vertical blur) ---
-        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0)
-        GLES20.glViewport(0, 0, surfaceWidth, surfaceHeight)
-        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT)
-        shader.useBlurPass(fboTexB, params, surfaceWidth, surfaceHeight, 0f, 1f)
-        drawQuad(
-            shader.blurPositionLoc, shader.blurTexCoordLoc,
-            fullscreenVertexBuffer, fullscreenTexCoordBuffer
-        )
+        // Draw quad
+        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4)
+
+        // Cleanup
+        GLES20.glDisableVertexAttribArray(shader.aPositionLocation)
+        GLES20.glDisableVertexAttribArray(shader.aTexCoordLocation)
     }
 
+    /**
+     * Updates blur parameters. Thread-safe.
+     */
     fun updateParameters(params: BlurParameters) {
         blurParameters = params
     }
 
+    /**
+     * Sets whether using front camera. Updates texture coordinates accordingly.
+     * Thread-safe - actual buffer update happens on next frame.
+     */
     fun setFrontCamera(front: Boolean) {
         if (isFrontCamera != front) {
             isFrontCamera = front
             currentTexCoords = if (front) texCoordsFront else texCoordsBack
+            // Buffer will be updated on next draw
             updateTexCoordBuffer = true
         }
     }
 
+    @Volatile
+    private var updateTexCoordBuffer = false
+
+    /**
+     * Sets the camera preview resolution for crop-to-fill aspect ratio correction.
+     * Thread-safe — vertex buffer is recomputed on the next frame.
+     */
     fun setCameraResolution(width: Int, height: Int) {
         if (cameraWidth != width || cameraHeight != height) {
             cameraWidth = width
@@ -218,6 +204,45 @@ class TiltShiftRenderer(
         }
     }
 
+    /**
+     * Recomputes vertex positions to achieve crop-to-fill.
+     *
+     * The camera sensor is landscape; after the 90° rotation applied via texture coordinates,
+     * the effective portrait dimensions are (cameraHeight × cameraWidth). We scale the vertex
+     * quad so the camera frame fills the screen without stretching — the GPU clips the overflow.
+     */
+    private fun recomputeVertices() {
+        var scaleX = 1f
+        var scaleY = 1f
+
+        if (cameraWidth > 0 && cameraHeight > 0 && surfaceWidth > 0 && surfaceHeight > 0) {
+            // After 90° rotation: portrait width = cameraHeight, portrait height = cameraWidth
+            val cameraRatio = cameraHeight.toFloat() / cameraWidth
+            val screenRatio = surfaceWidth.toFloat() / surfaceHeight
+
+            if (cameraRatio > screenRatio) {
+                // Camera wider than screen → crop sides
+                scaleX = cameraRatio / screenRatio
+            } else {
+                // Camera taller than screen → crop top/bottom
+                scaleY = screenRatio / cameraRatio
+            }
+        }
+
+        vertexBuffer.clear()
+        vertexBuffer.put(floatArrayOf(
+            -scaleX, -scaleY,
+             scaleX, -scaleY,
+            -scaleX,  scaleY,
+             scaleX,  scaleY
+        ))
+        vertexBuffer.position(0)
+    }
+
+    /**
+     * Releases OpenGL resources.
+     * Must be called from GL thread.
+     */
     fun release() {
         shader.release()
         surfaceTexture?.release()
@@ -227,117 +252,5 @@ class TiltShiftRenderer(
             GLES20.glDeleteTextures(1, intArrayOf(cameraTextureId), 0)
             cameraTextureId = 0
         }
-
-        deleteFBOs()
-    }
-
-    // --- Private helpers ---
-
-    private fun drawQuad(
-        positionLoc: Int,
-        texCoordLoc: Int,
-        vertices: FloatBuffer,
-        texCoords: FloatBuffer
-    ) {
-        GLES20.glEnableVertexAttribArray(positionLoc)
-        GLES20.glVertexAttribPointer(positionLoc, 2, GLES20.GL_FLOAT, false, 0, vertices)
-
-        GLES20.glEnableVertexAttribArray(texCoordLoc)
-        GLES20.glVertexAttribPointer(texCoordLoc, 2, GLES20.GL_FLOAT, false, 0, texCoords)
-
-        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4)
-
-        GLES20.glDisableVertexAttribArray(positionLoc)
-        GLES20.glDisableVertexAttribArray(texCoordLoc)
-    }
-
-    /**
-     * Recomputes camera vertex positions to achieve crop-to-fill.
-     *
-     * The camera sensor is landscape; after the 90° rotation applied via texture coordinates,
-     * the effective portrait dimensions are (cameraHeight × cameraWidth). We scale the vertex
-     * quad so the camera frame fills the surface without stretching — the GPU clips the overflow.
-     */
-    private fun recomputeVertices() {
-        var scaleX = 1f
-        var scaleY = 1f
-
-        if (cameraWidth > 0 && cameraHeight > 0 && surfaceWidth > 0 && surfaceHeight > 0) {
-            val cameraRatio = cameraHeight.toFloat() / cameraWidth
-            val screenRatio = surfaceWidth.toFloat() / surfaceHeight
-
-            if (cameraRatio > screenRatio) {
-                scaleX = cameraRatio / screenRatio
-            } else {
-                scaleY = screenRatio / cameraRatio
-            }
-        }
-
-        cameraVertexBuffer.clear()
-        cameraVertexBuffer.put(floatArrayOf(
-            -scaleX, -scaleY,
-             scaleX, -scaleY,
-            -scaleX,  scaleY,
-             scaleX,  scaleY
-        ))
-        cameraVertexBuffer.position(0)
-    }
-
-    private fun recreateFBOs(width: Int, height: Int) {
-        deleteFBOs()
-
-        // Create two color textures for ping-pong
-        val texIds = IntArray(2)
-        GLES20.glGenTextures(2, texIds, 0)
-        fboTexA = texIds[0]
-        fboTexB = texIds[1]
-
-        for (texId in texIds) {
-            GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texId)
-            GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR)
-            GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR)
-            GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE)
-            GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE)
-            GLES20.glTexImage2D(
-                GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA,
-                width, height, 0,
-                GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, null
-            )
-        }
-
-        // Create single FBO (we swap the attached texture for ping-pong)
-        val fbos = IntArray(1)
-        GLES20.glGenFramebuffers(1, fbos, 0)
-        fboId = fbos[0]
-
-        // Verify with texture A
-        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, fboId)
-        GLES20.glFramebufferTexture2D(
-            GLES20.GL_FRAMEBUFFER, GLES20.GL_COLOR_ATTACHMENT0,
-            GLES20.GL_TEXTURE_2D, fboTexA, 0
-        )
-        val status = GLES20.glCheckFramebufferStatus(GLES20.GL_FRAMEBUFFER)
-        if (status != GLES20.GL_FRAMEBUFFER_COMPLETE) {
-            Log.e(TAG, "FBO incomplete: $status")
-        }
-        GLES20.glBindFramebuffer(GLES20.GL_FRAMEBUFFER, 0)
-    }
-
-    private fun deleteFBOs() {
-        if (fboId != 0) {
-            GLES20.glDeleteFramebuffers(1, intArrayOf(fboId), 0)
-            fboId = 0
-        }
-        if (fboTexA != 0 || fboTexB != 0) {
-            GLES20.glDeleteTextures(2, intArrayOf(fboTexA, fboTexB), 0)
-            fboTexA = 0
-            fboTexB = 0
-        }
-    }
-
-    private fun allocateFloatBuffer(floatCount: Int): FloatBuffer {
-        return ByteBuffer.allocateDirect(floatCount * 4)
-            .order(ByteOrder.nativeOrder())
-            .asFloatBuffer()
     }
 }
diff --git a/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftShader.kt b/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftShader.kt
index cdafd8f..2c3a7d5 100644
--- a/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftShader.kt
+++ b/app/src/main/java/no/naiv/tiltshift/effect/TiltShiftShader.kt
@@ -4,167 +4,57 @@ import android.content.Context
 import android.opengl.GLES11Ext
 import android.opengl.GLES20
 import no.naiv.tiltshift.R
-import java.io.BufferedReader
-import java.io.InputStreamReader
 import kotlin.math.cos
 import kotlin.math.sin
+import java.io.BufferedReader
+import java.io.InputStreamReader
 
 /**
- * Manages OpenGL shader programs for the two-pass tilt-shift effect.
- *
- * Two programs:
- * - **Passthrough**: copies camera texture (external OES) to an FBO, handling the
- *   coordinate transform via vertex/texcoord setup.
- * - **Blur**: applies a directional Gaussian blur with tilt-shift mask.
- *   Used twice per frame (horizontal then vertical) via the [uBlurDirection] uniform.
+ * Manages OpenGL shader programs for the tilt-shift effect.
  */
 class TiltShiftShader(private val context: Context) {
 
-    // --- Passthrough program (camera → FBO) ---
-
-    private var passthroughProgramId: Int = 0
-
-    var passthroughPositionLoc: Int = 0
+    var programId: Int = 0
         private set
-    var passthroughTexCoordLoc: Int = 0
-        private set
-    private var passthroughTextureLoc: Int = 0
 
-    // --- Blur program (FBO → FBO/screen) ---
-
-    private var blurProgramId: Int = 0
-
-    var blurPositionLoc: Int = 0
+    // Attribute locations
+    var aPositionLocation: Int = 0
         private set
-    var blurTexCoordLoc: Int = 0
+    var aTexCoordLocation: Int = 0
         private set
-    private var blurTextureLoc: Int = 0
-    private var blurModeLoc: Int = 0
-    private var blurPositionXLoc: Int = 0
-    private var blurPositionYLoc: Int = 0
-    private var blurSizeLoc: Int = 0
-    private var blurAmountLoc: Int = 0
-    private var blurFalloffLoc: Int = 0
-    private var blurAspectRatioLoc: Int = 0
-    private var blurResolutionLoc: Int = 0
-    private var blurCosAngleLoc: Int = 0
-    private var blurSinAngleLoc: Int = 0
-    private var blurDirectionLoc: Int = 0
+
+    // Uniform locations
+    private var uTextureLocation: Int = 0
+    private var uModeLocation: Int = 0
+    private var uIsFrontCameraLocation: Int = 0
+    private var uAngleLocation: Int = 0
+    private var uPositionXLocation: Int = 0
+    private var uPositionYLocation: Int = 0
+    private var uSizeLocation: Int = 0
+    private var uBlurAmountLocation: Int = 0
+    private var uFalloffLocation: Int = 0
+    private var uAspectRatioLocation: Int = 0
+    private var uResolutionLocation: Int = 0
+    private var uCosAngleLocation: Int = 0
+    private var uSinAngleLocation: Int = 0
 
     /**
-     * Compiles and links both shader programs.
+     * Compiles and links the shader program.
      * Must be called from GL thread.
      */
     fun initialize() {
         val vertexSource = loadShaderSource(R.raw.tiltshift_vertex)
+        val fragmentSource = loadShaderSource(R.raw.tiltshift_fragment)
+
         val vertexShader = compileShader(GLES20.GL_VERTEX_SHADER, vertexSource)
+        val fragmentShader = compileShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource)
 
-        // Passthrough program
-        val passthroughFragSource = loadShaderSource(R.raw.tiltshift_passthrough_fragment)
-        val passthroughFragShader = compileShader(GLES20.GL_FRAGMENT_SHADER, passthroughFragSource)
-        passthroughProgramId = linkProgram(vertexShader, passthroughFragShader)
-        GLES20.glDeleteShader(passthroughFragShader)
-
-        passthroughPositionLoc = GLES20.glGetAttribLocation(passthroughProgramId, "aPosition")
-        passthroughTexCoordLoc = GLES20.glGetAttribLocation(passthroughProgramId, "aTexCoord")
-        passthroughTextureLoc = GLES20.glGetUniformLocation(passthroughProgramId, "uTexture")
-
-        // Blur program
-        val blurFragSource = loadShaderSource(R.raw.tiltshift_fragment)
-        val blurFragShader = compileShader(GLES20.GL_FRAGMENT_SHADER, blurFragSource)
-        blurProgramId = linkProgram(vertexShader, blurFragShader)
-        GLES20.glDeleteShader(blurFragShader)
-
-        blurPositionLoc = GLES20.glGetAttribLocation(blurProgramId, "aPosition")
-        blurTexCoordLoc = GLES20.glGetAttribLocation(blurProgramId, "aTexCoord")
-        blurTextureLoc = GLES20.glGetUniformLocation(blurProgramId, "uTexture")
-        blurModeLoc = GLES20.glGetUniformLocation(blurProgramId, "uMode")
-        blurPositionXLoc = GLES20.glGetUniformLocation(blurProgramId, "uPositionX")
-        blurPositionYLoc = GLES20.glGetUniformLocation(blurProgramId, "uPositionY")
-        blurSizeLoc = GLES20.glGetUniformLocation(blurProgramId, "uSize")
-        blurAmountLoc = GLES20.glGetUniformLocation(blurProgramId, "uBlurAmount")
-        blurFalloffLoc = GLES20.glGetUniformLocation(blurProgramId, "uFalloff")
-        blurAspectRatioLoc = GLES20.glGetUniformLocation(blurProgramId, "uAspectRatio")
-        blurResolutionLoc = GLES20.glGetUniformLocation(blurProgramId, "uResolution")
-        blurCosAngleLoc = GLES20.glGetUniformLocation(blurProgramId, "uCosAngle")
-        blurSinAngleLoc = GLES20.glGetUniformLocation(blurProgramId, "uSinAngle")
-        blurDirectionLoc = GLES20.glGetUniformLocation(blurProgramId, "uBlurDirection")
-
-        // Vertex shader is linked into both programs and can be freed
-        GLES20.glDeleteShader(vertexShader)
-    }
-
-    /**
-     * Activates the passthrough program and binds the camera texture.
-     */
-    fun usePassthrough(cameraTextureId: Int) {
-        GLES20.glUseProgram(passthroughProgramId)
-        GLES20.glActiveTexture(GLES20.GL_TEXTURE0)
-        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, cameraTextureId)
-        GLES20.glUniform1i(passthroughTextureLoc, 0)
-    }
-
-    /**
-     * Activates the blur program and sets all uniforms for one blur pass.
-     *
-     * @param fboTextureId The FBO color attachment to sample from.
-     * @param params       Current blur parameters.
-     * @param width        Surface width in pixels.
-     * @param height       Surface height in pixels.
-     * @param dirX         Blur direction X component (1 for horizontal pass, 0 for vertical).
-     * @param dirY         Blur direction Y component (0 for horizontal pass, 1 for vertical).
-     */
-    fun useBlurPass(
-        fboTextureId: Int,
-        params: BlurParameters,
-        width: Int,
-        height: Int,
-        dirX: Float,
-        dirY: Float
-    ) {
-        GLES20.glUseProgram(blurProgramId)
-
-        GLES20.glActiveTexture(GLES20.GL_TEXTURE0)
-        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, fboTextureId)
-        GLES20.glUniform1i(blurTextureLoc, 0)
-
-        GLES20.glUniform1i(blurModeLoc, if (params.mode == BlurMode.RADIAL) 1 else 0)
-        GLES20.glUniform1f(blurPositionXLoc, params.positionX)
-        GLES20.glUniform1f(blurPositionYLoc, params.positionY)
-        GLES20.glUniform1f(blurSizeLoc, params.size)
-        GLES20.glUniform1f(blurAmountLoc, params.blurAmount)
-        GLES20.glUniform1f(blurFalloffLoc, params.falloff)
-        GLES20.glUniform1f(blurAspectRatioLoc, params.aspectRatio)
-        GLES20.glUniform2f(blurResolutionLoc, width.toFloat(), height.toFloat())
-
-        // Raw screen-space angle (no camera rotation adjustment needed — FBO is already
-        // in screen orientation after the passthrough pass)
-        GLES20.glUniform1f(blurCosAngleLoc, cos(params.angle))
-        GLES20.glUniform1f(blurSinAngleLoc, sin(params.angle))
-
-        GLES20.glUniform2f(blurDirectionLoc, dirX, dirY)
-    }
-
-    /**
-     * Releases both shader programs.
-     */
-    fun release() {
-        if (passthroughProgramId != 0) {
-            GLES20.glDeleteProgram(passthroughProgramId)
-            passthroughProgramId = 0
-        }
-        if (blurProgramId != 0) {
-            GLES20.glDeleteProgram(blurProgramId)
-            blurProgramId = 0
-        }
-    }
-
-    private fun linkProgram(vertexShader: Int, fragmentShader: Int): Int {
-        val programId = GLES20.glCreateProgram()
+        programId = GLES20.glCreateProgram()
         GLES20.glAttachShader(programId, vertexShader)
         GLES20.glAttachShader(programId, fragmentShader)
         GLES20.glLinkProgram(programId)
 
+        // Check for link errors
         val linkStatus = IntArray(1)
         GLES20.glGetProgramiv(programId, GLES20.GL_LINK_STATUS, linkStatus, 0)
         if (linkStatus[0] == 0) {
@@ -173,7 +63,72 @@ class TiltShiftShader(private val context: Context) {
             throw RuntimeException("Shader program link failed: $error")
         }
 
-        return programId
+        // Get attribute locations
+        aPositionLocation = GLES20.glGetAttribLocation(programId, "aPosition")
+        aTexCoordLocation = GLES20.glGetAttribLocation(programId, "aTexCoord")
+
+        // Get uniform locations
+        uTextureLocation = GLES20.glGetUniformLocation(programId, "uTexture")
+        uModeLocation = GLES20.glGetUniformLocation(programId, "uMode")
+        uIsFrontCameraLocation = GLES20.glGetUniformLocation(programId, "uIsFrontCamera")
+        uAngleLocation = GLES20.glGetUniformLocation(programId, "uAngle")
+        uPositionXLocation = GLES20.glGetUniformLocation(programId, "uPositionX")
+        uPositionYLocation = GLES20.glGetUniformLocation(programId, "uPositionY")
+        uSizeLocation = GLES20.glGetUniformLocation(programId, "uSize")
+        uBlurAmountLocation = GLES20.glGetUniformLocation(programId, "uBlurAmount")
+        uFalloffLocation = GLES20.glGetUniformLocation(programId, "uFalloff")
+        uAspectRatioLocation = GLES20.glGetUniformLocation(programId, "uAspectRatio")
+        uResolutionLocation = GLES20.glGetUniformLocation(programId, "uResolution")
+        uCosAngleLocation = GLES20.glGetUniformLocation(programId, "uCosAngle")
+        uSinAngleLocation = GLES20.glGetUniformLocation(programId, "uSinAngle")
+
+        // Clean up shaders (they're linked into program now)
+        GLES20.glDeleteShader(vertexShader)
+        GLES20.glDeleteShader(fragmentShader)
+    }
+
+    /**
+     * Uses the shader program and sets uniforms.
+     */
+    fun use(textureId: Int, params: BlurParameters, width: Int, height: Int, isFrontCamera: Boolean = false) {
+        GLES20.glUseProgram(programId)
+
+        // Bind camera texture
+        GLES20.glActiveTexture(GLES20.GL_TEXTURE0)
+        GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, textureId)
+        GLES20.glUniform1i(uTextureLocation, 0)
+
+        // Set effect parameters
+        GLES20.glUniform1i(uModeLocation, if (params.mode == BlurMode.RADIAL) 1 else 0)
+        GLES20.glUniform1i(uIsFrontCameraLocation, if (isFrontCamera) 1 else 0)
+        GLES20.glUniform1f(uAngleLocation, params.angle)
+        GLES20.glUniform1f(uPositionXLocation, params.positionX)
+        GLES20.glUniform1f(uPositionYLocation, params.positionY)
+        GLES20.glUniform1f(uSizeLocation, params.size)
+        GLES20.glUniform1f(uBlurAmountLocation, params.blurAmount)
+        GLES20.glUniform1f(uFalloffLocation, params.falloff)
+        GLES20.glUniform1f(uAspectRatioLocation, params.aspectRatio)
+        GLES20.glUniform2f(uResolutionLocation, width.toFloat(), height.toFloat())
+
+        // Precompute angle trig on CPU to avoid per-fragment transcendental calls.
+        // The adjusted angle accounts for the 90deg coordinate transform.
+        val adjustedAngle = if (isFrontCamera) {
+            -params.angle - (Math.PI / 2).toFloat()
+        } else {
+            params.angle + (Math.PI / 2).toFloat()
+        }
+        GLES20.glUniform1f(uCosAngleLocation, cos(adjustedAngle))
+        GLES20.glUniform1f(uSinAngleLocation, sin(adjustedAngle))
+    }
+
+    /**
+     * Releases shader resources.
+     */
+    fun release() {
+        if (programId != 0) {
+            GLES20.glDeleteProgram(programId)
+            programId = 0
+        }
     }
 
     private fun loadShaderSource(resourceId: Int): String {
@@ -187,6 +142,7 @@ class TiltShiftShader(private val context: Context) {
         GLES20.glShaderSource(shader, source)
         GLES20.glCompileShader(shader)
 
+        // Check for compile errors
         val compileStatus = IntArray(1)
         GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compileStatus, 0)
         if (compileStatus[0] == 0) {
diff --git a/app/src/main/java/no/naiv/tiltshift/storage/PhotoSaver.kt b/app/src/main/java/no/naiv/tiltshift/storage/PhotoSaver.kt
index 7841f90..8facb4c 100644
--- a/app/src/main/java/no/naiv/tiltshift/storage/PhotoSaver.kt
+++ b/app/src/main/java/no/naiv/tiltshift/storage/PhotoSaver.kt
@@ -17,6 +17,18 @@ import java.time.format.DateTimeFormatter
 import java.util.Locale
 
 
+/**
+ * Result of a photo save operation.
+ */
+sealed class SaveResult {
+    data class Success(
+        val uri: Uri,
+        val originalUri: Uri? = null,
+        val thumbnail: android.graphics.Bitmap? = null
+    ) : SaveResult()
+    data class Error(val message: String, val exception: Exception? = null) : SaveResult()
+}
+
 /**
  * Handles saving captured photos to the device gallery.
  */
diff --git a/app/src/main/java/no/naiv/tiltshift/storage/SaveResult.kt b/app/src/main/java/no/naiv/tiltshift/storage/SaveResult.kt
deleted file mode 100644
index 4e5e700..0000000
--- a/app/src/main/java/no/naiv/tiltshift/storage/SaveResult.kt
+++ /dev/null
@@ -1,16 +0,0 @@
-package no.naiv.tiltshift.storage
-
-import android.graphics.Bitmap
-import android.net.Uri
-
-/**
- * Result of a photo save operation.
- */
-sealed class SaveResult {
-    data class Success(
-        val uri: Uri,
-        val originalUri: Uri? = null,
-        val thumbnail: Bitmap? = null
-    ) : SaveResult()
-    data class Error(val message: String, val exception: Exception? = null) : SaveResult()
-}
diff --git a/app/src/main/java/no/naiv/tiltshift/ui/TiltShiftOverlay.kt b/app/src/main/java/no/naiv/tiltshift/ui/TiltShiftOverlay.kt
index c74c8d7..d7e6e4a 100644
--- a/app/src/main/java/no/naiv/tiltshift/ui/TiltShiftOverlay.kt
+++ b/app/src/main/java/no/naiv/tiltshift/ui/TiltShiftOverlay.kt
@@ -232,9 +232,9 @@ private fun determineGestureType(
     return when {
         // Very center of focus zone -> rotation (small area)
         distFromCenter < focusSize * 0.3f -> GestureType.ROTATE
-        // Near the blur boundary -> size adjustment
-        distFromCenter < focusSize * 1.3f -> GestureType.PINCH_SIZE
-        // Outside the effect -> camera zoom
+        // Near the blur effect -> size adjustment (large area)
+        distFromCenter < focusSize * 2.0f -> GestureType.PINCH_SIZE
+        // Far outside -> camera zoom
         else -> GestureType.PINCH_ZOOM
     }
 }
diff --git a/app/src/main/res/raw/tiltshift_fragment.glsl b/app/src/main/res/raw/tiltshift_fragment.glsl
index 0caa115..f1618e4 100644
--- a/app/src/main/res/raw/tiltshift_fragment.glsl
+++ b/app/src/main/res/raw/tiltshift_fragment.glsl
@@ -1,58 +1,71 @@
-// Fragment shader for tilt-shift blur pass (two-pass separable Gaussian)
-// Reads from a sampler2D (FBO texture already in screen orientation).
-// Used twice: once for horizontal blur, once for vertical blur.
+#extension GL_OES_EGL_image_external : require
+
+// Fragment shader for tilt-shift effect
+// Supports both linear and radial blur modes
 
 precision mediump float;
 
-uniform sampler2D uTexture;
+// Camera texture (external texture for camera preview)
+uniform samplerExternalOES uTexture;
 
 // Effect parameters
 uniform int uMode;              // 0 = linear, 1 = radial
-uniform float uPositionX;       // Horizontal center of focus (0-1, screen space)
-uniform float uPositionY;       // Vertical center of focus (0-1, screen space, 0 = top)
+uniform int uIsFrontCamera;     // 0 = back camera, 1 = front camera
+uniform float uAngle;           // Rotation angle in radians
+uniform float uPositionX;       // Horizontal center of focus (0-1)
+uniform float uPositionY;       // Vertical center of focus (0-1)
 uniform float uSize;            // Size of in-focus region (0-1)
 uniform float uBlurAmount;      // Maximum blur intensity (0-1)
 uniform float uFalloff;         // Transition sharpness (0-1, higher = more gradual)
 uniform float uAspectRatio;     // Ellipse aspect ratio for radial mode
-uniform vec2 uResolution;       // Surface resolution for proper sampling
+uniform vec2 uResolution;       // Texture resolution for proper sampling
 
-// Precomputed trig for the raw screen-space angle
+// Precomputed trig for the adjusted angle (avoids per-fragment cos/sin calls)
 uniform float uCosAngle;
 uniform float uSinAngle;
 
-// Blur direction: (1,0) for horizontal pass, (0,1) for vertical pass
-uniform vec2 uBlurDirection;
-
 varying vec2 vTexCoord;
 
-// Calculate distance from the focus region for LINEAR mode
-// Works in screen space: X right (0-1), Y down (0-1)
-// Distances are normalized to the Y axis (height) to match the overlay,
-// which defines focus size as a fraction of screen height.
-float linearFocusDistance(vec2 screenPos) {
-    vec2 center = vec2(uPositionX, uPositionY);
-    vec2 offset = screenPos - center;
+// Calculate signed distance from the focus region for LINEAR mode
+float linearFocusDistance(vec2 uv) {
+    // Center point of the focus region
+    // Transform from screen coordinates to texture coordinates
+    // Back camera: Screen (x,y) -> Texture (y, 1-x)
+    // Front camera: Screen (x,y) -> Texture (1-y, 1-x) (additional X flip for mirror)
+    vec2 center;
+    if (uIsFrontCamera == 1) {
+        center = vec2(1.0 - uPositionY, 1.0 - uPositionX);
+    } else {
+        center = vec2(uPositionY, 1.0 - uPositionX);
+    }
+    vec2 offset = uv - center;
 
-    // Scale X into the same physical units as Y (height-normalized)
+    // Correct for screen aspect ratio to make coordinate space square
     float screenAspect = uResolution.x / uResolution.y;
-    offset.x *= screenAspect;
+    offset.y *= screenAspect;
 
-    // Perpendicular distance to the rotated focus line
+    // Use precomputed cos/sin for the adjusted angle
     float rotatedY = -offset.x * uSinAngle + offset.y * uCosAngle;
 
     return abs(rotatedY);
 }
 
-// Calculate distance from the focus region for RADIAL mode
-float radialFocusDistance(vec2 screenPos) {
-    vec2 center = vec2(uPositionX, uPositionY);
-    vec2 offset = screenPos - center;
+// Calculate signed distance from the focus region for RADIAL mode
+float radialFocusDistance(vec2 uv) {
+    // Center point of the focus region
+    vec2 center;
+    if (uIsFrontCamera == 1) {
+        center = vec2(1.0 - uPositionY, 1.0 - uPositionX);
+    } else {
+        center = vec2(uPositionY, 1.0 - uPositionX);
+    }
+    vec2 offset = uv - center;
 
-    // Scale X into the same physical units as Y (height-normalized)
+    // Correct for screen aspect ratio
     float screenAspect = uResolution.x / uResolution.y;
-    offset.x *= screenAspect;
+    offset.y *= screenAspect;
 
-    // Rotate offset
+    // Use precomputed cos/sin for rotation
     vec2 rotated = vec2(
         offset.x * uCosAngle - offset.y * uSinAngle,
         offset.x * uSinAngle + offset.y * uCosAngle
@@ -61,59 +74,83 @@ float radialFocusDistance(vec2 screenPos) {
     // Apply ellipse aspect ratio
     rotated.x /= uAspectRatio;
 
+    // Distance from center (elliptical)
     return length(rotated);
 }
 
 // Calculate blur factor based on distance from focus
 float blurFactor(float dist) {
     float halfSize = uSize * 0.5;
-    float transitionSize = halfSize * uFalloff * 3.0;
+    // Falloff range scales with the falloff parameter
+    float transitionSize = halfSize * uFalloff;
 
     if (dist < halfSize) {
-        return 0.0;
+        return 0.0;  // In focus region
     }
 
+    // Smooth falloff using smoothstep
     float normalizedDist = (dist - halfSize) / max(transitionSize, 0.001);
     return smoothstep(0.0, 1.0, normalizedDist) * uBlurAmount;
 }
 
-void main() {
-    // Convert FBO texture coords to screen space (flip Y: GL bottom-up → screen top-down)
-    vec2 screenPos = vec2(vTexCoord.x, 1.0 - vTexCoord.y);
+// Sample with Gaussian blur (9-tap, sigma ~= 2.0, unrolled for GLSL ES 1.00 compatibility)
+vec4 sampleBlurred(vec2 uv, float blur) {
+    if (blur < 0.01) {
+        return texture2D(uTexture, uv);
+    }
 
+    vec2 texelSize = 1.0 / uResolution;
+
+    // For radial mode, blur in radial direction from center
+    // For linear mode, blur perpendicular to focus line
+    vec2 blurDir;
+    if (uMode == 1) {
+        // Radial: blur away from center
+        vec2 center;
+        if (uIsFrontCamera == 1) {
+            center = vec2(1.0 - uPositionY, 1.0 - uPositionX);
+        } else {
+            center = vec2(uPositionY, 1.0 - uPositionX);
+        }
+        vec2 toCenter = uv - center;
+        float len = length(toCenter);
+        if (len > 0.001) {
+            blurDir = toCenter / len;
+        } else {
+            blurDir = vec2(1.0, 0.0);
+        }
+    } else {
+        // Linear: blur perpendicular to focus line using precomputed trig
+        blurDir = vec2(uCosAngle, uSinAngle);
+    }
+
+    // Scale blur radius by blur amount
+    float radius = blur * 20.0;
+    vec2 step = blurDir * texelSize * radius;
+
+    // Unrolled 9-tap Gaussian blur (avoids integer-branched weight lookup)
+    vec4 color = vec4(0.0);
+    color += texture2D(uTexture, uv + step * -4.0) * 0.0162;
+    color += texture2D(uTexture, uv + step * -3.0) * 0.0540;
+    color += texture2D(uTexture, uv + step * -2.0) * 0.1216;
+    color += texture2D(uTexture, uv + step * -1.0) * 0.1933;
+    color += texture2D(uTexture, uv)                * 0.2258;
+    color += texture2D(uTexture, uv + step *  1.0) * 0.1933;
+    color += texture2D(uTexture, uv + step *  2.0) * 0.1216;
+    color += texture2D(uTexture, uv + step *  3.0) * 0.0540;
+    color += texture2D(uTexture, uv + step *  4.0) * 0.0162;
+
+    return color;
+}
+
+void main() {
     float dist;
     if (uMode == 1) {
-        dist = radialFocusDistance(screenPos);
+        dist = radialFocusDistance(vTexCoord);
     } else {
-        dist = linearFocusDistance(screenPos);
+        dist = linearFocusDistance(vTexCoord);
     }
     float blur = blurFactor(dist);
 
-    if (blur < 0.01) {
-        gl_FragColor = texture2D(uTexture, vTexCoord);
-        return;
-    }
-
-    // 13-tap separable Gaussian (sigma ~= 2.5)
-    // Each pass blurs in one direction; combined gives a full 2D Gaussian.
-    vec2 texelSize = 1.0 / uResolution;
-    float radius = blur * 20.0;
-    vec2 step = uBlurDirection * texelSize * radius;
-
-    vec4 color = vec4(0.0);
-    color += texture2D(uTexture, vTexCoord + step * -6.0) * 0.0090;
-    color += texture2D(uTexture, vTexCoord + step * -5.0) * 0.0218;
-    color += texture2D(uTexture, vTexCoord + step * -4.0) * 0.0448;
-    color += texture2D(uTexture, vTexCoord + step * -3.0) * 0.0784;
-    color += texture2D(uTexture, vTexCoord + step * -2.0) * 0.1169;
-    color += texture2D(uTexture, vTexCoord + step * -1.0) * 0.1486;
-    color += texture2D(uTexture, vTexCoord)               * 0.1610;
-    color += texture2D(uTexture, vTexCoord + step *  1.0) * 0.1486;
-    color += texture2D(uTexture, vTexCoord + step *  2.0) * 0.1169;
-    color += texture2D(uTexture, vTexCoord + step *  3.0) * 0.0784;
-    color += texture2D(uTexture, vTexCoord + step *  4.0) * 0.0448;
-    color += texture2D(uTexture, vTexCoord + step *  5.0) * 0.0218;
-    color += texture2D(uTexture, vTexCoord + step *  6.0) * 0.0090;
-
-    gl_FragColor = color;
+    gl_FragColor = sampleBlurred(vTexCoord, blur);
 }
diff --git a/app/src/main/res/raw/tiltshift_passthrough_fragment.glsl b/app/src/main/res/raw/tiltshift_passthrough_fragment.glsl
deleted file mode 100644
index 4d5edcd..0000000
--- a/app/src/main/res/raw/tiltshift_passthrough_fragment.glsl
+++ /dev/null
@@ -1,15 +0,0 @@
-#extension GL_OES_EGL_image_external : require
-
-// Passthrough fragment shader: copies camera texture to FBO
-// This separates the camera coordinate transform (handled by vertex/texcoord setup)
-// from the blur passes, which then work entirely in screen space.
-
-precision mediump float;
-
-uniform samplerExternalOES uTexture;
-
-varying vec2 vTexCoord;
-
-void main() {
-    gl_FragColor = texture2D(uTexture, vTexCoord);
-}
diff --git a/app/src/test/java/no/naiv/tiltshift/camera/LensControllerTest.kt b/app/src/test/java/no/naiv/tiltshift/camera/LensControllerTest.kt
deleted file mode 100644
index 6a5ec20..0000000
--- a/app/src/test/java/no/naiv/tiltshift/camera/LensControllerTest.kt
+++ /dev/null
@@ -1,38 +0,0 @@
-package no.naiv.tiltshift.camera
-
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
-import org.junit.Assert.assertNotNull
-import org.junit.Assert.assertNull
-import org.junit.Assert.assertTrue
-import org.junit.Test
-
-class LensControllerTest {
-
-    @Test
-    fun `getCurrentLens returns null before initialization`() {
-        val controller = LensController()
-        assertNull(controller.getCurrentLens())
-    }
-
-    @Test
-    fun `getAvailableLenses returns empty before initialization`() {
-        val controller = LensController()
-        assertTrue(controller.getAvailableLenses().isEmpty())
-    }
-
-    @Test
-    fun `selectLens returns false for unknown lens`() {
-        val controller = LensController()
-        assertFalse(controller.selectLens("nonexistent"))
-    }
-
-    @Test
-    fun `cycleToNextLens returns null when no lenses`() {
-        val controller = LensController()
-        assertNull(controller.cycleToNextLens())
-    }
-
-    // Note: initialize() requires CameraInfo instances which need Android framework.
-    // Integration tests with Robolectric or on-device tests would cover that path.
-}
diff --git a/app/src/test/java/no/naiv/tiltshift/effect/BlurParametersTest.kt b/app/src/test/java/no/naiv/tiltshift/effect/BlurParametersTest.kt
deleted file mode 100644
index d133f09..0000000
--- a/app/src/test/java/no/naiv/tiltshift/effect/BlurParametersTest.kt
+++ /dev/null
@@ -1,151 +0,0 @@
-package no.naiv.tiltshift.effect
-
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertNotEquals
-import org.junit.Test
-import kotlin.math.PI
-
-class BlurParametersTest {
-
-    @Test
-    fun `DEFAULT has expected values`() {
-        val default = BlurParameters.DEFAULT
-        assertEquals(BlurMode.LINEAR, default.mode)
-        assertEquals(0f, default.angle, 0f)
-        assertEquals(0.5f, default.positionX, 0f)
-        assertEquals(0.5f, default.positionY, 0f)
-        assertEquals(0.3f, default.size, 0f)
-        assertEquals(0.8f, default.blurAmount, 0f)
-        assertEquals(0.5f, default.falloff, 0f)
-        assertEquals(1.0f, default.aspectRatio, 0f)
-    }
-
-    // --- withSize ---
-
-    @Test
-    fun `withSize clamps below minimum`() {
-        val params = BlurParameters.DEFAULT.withSize(0.01f)
-        assertEquals(BlurParameters.MIN_SIZE, params.size, 0f)
-    }
-
-    @Test
-    fun `withSize clamps above maximum`() {
-        val params = BlurParameters.DEFAULT.withSize(5.0f)
-        assertEquals(BlurParameters.MAX_SIZE, params.size, 0f)
-    }
-
-    @Test
-    fun `withSize accepts value in range`() {
-        val params = BlurParameters.DEFAULT.withSize(0.5f)
-        assertEquals(0.5f, params.size, 0f)
-    }
-
-    // --- withBlurAmount ---
-
-    @Test
-    fun `withBlurAmount clamps below minimum`() {
-        val params = BlurParameters.DEFAULT.withBlurAmount(-1f)
-        assertEquals(BlurParameters.MIN_BLUR, params.blurAmount, 0f)
-    }
-
-    @Test
-    fun `withBlurAmount clamps above maximum`() {
-        val params = BlurParameters.DEFAULT.withBlurAmount(2f)
-        assertEquals(BlurParameters.MAX_BLUR, params.blurAmount, 0f)
-    }
-
-    // --- withFalloff ---
-
-    @Test
-    fun `withFalloff clamps below minimum`() {
-        val params = BlurParameters.DEFAULT.withFalloff(0f)
-        assertEquals(BlurParameters.MIN_FALLOFF, params.falloff, 0f)
-    }
-
-    @Test
-    fun `withFalloff clamps above maximum`() {
-        val params = BlurParameters.DEFAULT.withFalloff(5f)
-        assertEquals(BlurParameters.MAX_FALLOFF, params.falloff, 0f)
-    }
-
-    // --- withAspectRatio ---
-
-    @Test
-    fun `withAspectRatio clamps below minimum`() {
-        val params = BlurParameters.DEFAULT.withAspectRatio(0.1f)
-        assertEquals(BlurParameters.MIN_ASPECT, params.aspectRatio, 0f)
-    }
-
-    @Test
-    fun `withAspectRatio clamps above maximum`() {
-        val params = BlurParameters.DEFAULT.withAspectRatio(10f)
-        assertEquals(BlurParameters.MAX_ASPECT, params.aspectRatio, 0f)
-    }
-
-    // --- withPosition ---
-
-    @Test
-    fun `withPosition clamps to 0-1 range`() {
-        val params = BlurParameters.DEFAULT.withPosition(-0.5f, 1.5f)
-        assertEquals(0f, params.positionX, 0f)
-        assertEquals(1f, params.positionY, 0f)
-    }
-
-    @Test
-    fun `withPosition accepts values in range`() {
-        val params = BlurParameters.DEFAULT.withPosition(0.3f, 0.7f)
-        assertEquals(0.3f, params.positionX, 0f)
-        assertEquals(0.7f, params.positionY, 0f)
-    }
-
-    // --- withAngle ---
-
-    @Test
-    fun `withAngle sets arbitrary angle`() {
-        val angle = PI.toFloat() / 4
-        val params = BlurParameters.DEFAULT.withAngle(angle)
-        assertEquals(angle, params.angle, 0f)
-    }
-
-    // --- copy preserves other fields ---
-
-    @Test
-    fun `with methods preserve other fields`() {
-        val custom = BlurParameters(
-            mode = BlurMode.RADIAL,
-            angle = 1.5f,
-            positionX = 0.2f,
-            positionY = 0.8f,
-            size = 0.4f,
-            blurAmount = 0.6f,
-            falloff = 0.7f,
-            aspectRatio = 2.0f
-        )
-
-        val updated = custom.withSize(0.5f)
-        assertEquals(BlurMode.RADIAL, updated.mode)
-        assertEquals(1.5f, updated.angle, 0f)
-        assertEquals(0.2f, updated.positionX, 0f)
-        assertEquals(0.8f, updated.positionY, 0f)
-        assertEquals(0.5f, updated.size, 0f)
-        assertEquals(0.6f, updated.blurAmount, 0f)
-        assertEquals(0.7f, updated.falloff, 0f)
-        assertEquals(2.0f, updated.aspectRatio, 0f)
-    }
-
-    // --- data class equality ---
-
-    @Test
-    fun `data class equality works`() {
-        val a = BlurParameters(mode = BlurMode.LINEAR, size = 0.5f)
-        val b = BlurParameters(mode = BlurMode.LINEAR, size = 0.5f)
-        assertEquals(a, b)
-    }
-
-    @Test
-    fun `different params are not equal`() {
-        val a = BlurParameters(mode = BlurMode.LINEAR)
-        val b = BlurParameters(mode = BlurMode.RADIAL)
-        assertNotEquals(a, b)
-    }
-}
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index c0b8626..37e1882 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -6,9 +6,9 @@ lifecycleRuntimeKtx = "2.8.7"
 activityCompose = "1.9.3"
 composeBom = "2024.12.01"
 camerax = "1.4.1"
+accompanist = "0.36.0"
 exifinterface = "1.3.7"
 playServicesLocation = "21.3.0"
-junit = "4.13.2"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -36,8 +36,8 @@ androidx-exifinterface = { group = "androidx.exifinterface", name = "exifinterfa
 # Location
 play-services-location = { group = "com.google.android.gms", name = "play-services-location", version.ref = "playServicesLocation" }
 
-# Test
-junit = { group = "junit", name = "junit", version.ref = "junit" }
+# Accompanist for permissions
+accompanist-permissions = { group = "com.google.accompanist", name = "accompanist-permissions", version.ref = "accompanist" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
diff --git a/version.properties b/version.properties
index 1046899..a074999 100644
--- a/version.properties
+++ b/version.properties
@@ -1,4 +1,4 @@
 versionMajor=1
 versionMinor=1
-versionPatch=3
-versionCode=5
+versionPatch=1
+versionCode=3