diff --git a/MIGRATION.md b/MIGRATION.md
index c486df89..4fbcc68f 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -134,16 +134,18 @@ Might be used in the future to speed up development.
 - Default `Facing` value is not `BACK` anymore but rather a value that guarantees that you have cameras (if possible).
   If device has no `BACK` cameras, defaults to `FRONT`.  
   
+
+TODO: think bout getPreviewSize() being removed, and think about adding a setPreviewSize().
+      If adding getPreviewSize() back, update this doc.
+TODO: fix video recording rotation: with front camera, it does not work.
+TODO: opencollective
+
 TODO: document cameraGridColor
 TODO: document setVideoBitRate
 TODO: document setAudioBitRate
 TODO: document takeVideoSnapshot
 TODO: document that takePictureSnaphot works while taking videos, if GL_SURFACE
 TODO: document the camera previews
-TODO: think bout getPreviewSize() being removed, and think about adding a setPreviewSize().
-      If adding getPreviewSize() back, update this doc.
-TODO: fix video recording rotation: with front camera, it does not work.
-TODO: opencollective
 TODO: new docs?
 
 
diff --git a/cameraview/src/main/gles/com/otaliastudios/cameraview/EglViewport.java b/cameraview/src/main/gles/com/otaliastudios/cameraview/EglViewport.java
index 7f437ed6..20556e99 100644
--- a/cameraview/src/main/gles/com/otaliastudios/cameraview/EglViewport.java
+++ b/cameraview/src/main/gles/com/otaliastudios/cameraview/EglViewport.java
@@ -29,12 +29,26 @@ class EglViewport extends EglElement {
                     "    vTextureScale = uTextureScale.xy;\n" +
                     "}\n";
 
-    // Circle fragment shader for use with external 2D textures
-    // We draw as transparent all the pixels outside the circle of center (0.5, 0.5)
-    // and radius 0.5. Works well! But we have:
-    // - black in the preview. Solved with canvas.clipPath and a custom GlSurfaceView.
-    // - black in picture snapshots, UNLESS we use PNG which is super slow
-    // - black in videos because they have no alpha channel
+    // Simple fragment shader for use with external 2D textures
+    private static final String SIMPLE_FRAGMENT_SHADER =
+            "#extension GL_OES_EGL_image_external : require\n" +
+                    "precision mediump float;\n" +
+                    "varying vec2 vTextureCoord;\n" +
+                    "uniform samplerExternalOES sTexture;\n" +
+                    "void main() {\n" +
+                    "    gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +
+                    "}\n";
+
+    /**
+     * EXPERIMENT:
+     * An oval fragment shader. We draw all the pixels outside the circle of center (0.5, 0.5)
+     * and radius 0.5 as transparent. Works well, but we have:
+     *
+     * 1. black in the preview: This can be solved with a custom GlSurfaceView that overrides
+     *    dispatchDraw, and, before calling super, clips the canvas with an oval path (canvas.clipPath).
+     * 2. black in picture snapshot: This can be solved by using PNG, but it is suepr slow.
+     * 3. black in videos: No way to solve this AFAIK.
+     */
     private static final String CIRCLE_FRAGMENT_SHADER =
             "#extension GL_OES_EGL_image_external : require\n" +
                     "precision mediump float;\n" +
@@ -52,16 +66,6 @@ class EglViewport extends EglElement {
                     "    }\n" +
                     "}\n";
 
-    // Simple fragment shader for use with external 2D textures
-    private static final String SIMPLE_FRAGMENT_SHADER =
-            "#extension GL_OES_EGL_image_external : require\n" +
-                    "precision mediump float;\n" +
-                    "varying vec2 vTextureCoord;\n" +
-                    "uniform samplerExternalOES sTexture;\n" +
-                    "void main() {\n" +
-                    "    gl_FragColor = texture2D(sTexture, vTextureCoord);\n" +
-                    "}\n";
-
     // Stuff from Drawable2d.FULL_RECTANGLE
     // A full square, extending from -1 to +1 in both dimensions.
     // When the model/view/projection matrix is identity, this will exactly cover the viewport.
@@ -102,7 +106,7 @@ class EglViewport extends EglElement {
 
     EglViewport() {
         mTextureTarget = GLES11Ext.GL_TEXTURE_EXTERNAL_OES;
-        mProgramHandle = createProgram(SIMPLE_VERTEX_SHADER, CIRCLE_FRAGMENT_SHADER);
+        mProgramHandle = createProgram(SIMPLE_VERTEX_SHADER, SIMPLE_FRAGMENT_SHADER);
         maPositionLocation = GLES20.glGetAttribLocation(mProgramHandle, "aPosition");
         checkLocation(maPositionLocation, "aPosition");
         maTextureCoordLocation = GLES20.glGetAttribLocation(mProgramHandle, "aTextureCoord");
diff --git a/cameraview/src/main/res/layout/cameraview_gl_view.xml b/cameraview/src/main/res/layout/cameraview_gl_view.xml
index 88b19411..0525ee6e 100644
--- a/cameraview/src/main/res/layout/cameraview_gl_view.xml
+++ b/cameraview/src/main/res/layout/cameraview_gl_view.xml
@@ -6,8 +6,7 @@
     android:layout_gravity="center"
     android:gravity="center">
 
-    <view
-        class="com.otaliastudios.cameraview.GlCameraPreview$ClippingSurfaceView"
+    <android.opengl.GLSurfaceView
         android:id="@+id/gl_surface_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
diff --git a/cameraview/src/main/views/com/otaliastudios/cameraview/GlCameraPreview.java b/cameraview/src/main/views/com/otaliastudios/cameraview/GlCameraPreview.java
index 65c3c3af..9672f90b 100644
--- a/cameraview/src/main/views/com/otaliastudios/cameraview/GlCameraPreview.java
+++ b/cameraview/src/main/views/com/otaliastudios/cameraview/GlCameraPreview.java
@@ -75,32 +75,6 @@ class GlCameraPreview extends CameraPreview<GLSurfaceView, SurfaceTexture> imple
         super(context, parent, callback);
     }
 
-    static class ClippingSurfaceView extends GLSurfaceView {
-
-        private Path path = new Path();
-        private RectF rect = new RectF();
-
-        public ClippingSurfaceView(Context context) {
-            super(context);
-        }
-        public ClippingSurfaceView(Context context, AttributeSet attrs) {
-            super(context, attrs);
-        }
-
-        @Override
-        protected void dispatchDraw(Canvas canvas) {
-            if (false) {
-                if (getWidth() != rect.width() || getHeight() != rect.height()) {
-                    rect.set(0, 0, getWidth(), getHeight());
-                    path.rewind();
-                    path.addOval(rect, Path.Direction.CW);
-                }
-                canvas.clipPath(path);
-            }
-            super.dispatchDraw(canvas);
-        }
-    }
-
     @NonNull
     @Override
     protected GLSurfaceView onCreateView(@NonNull Context context, @NonNull ViewGroup parent) {