diff --git a/android/rngl.iml b/android/rngl.iml
index 686ef627749ca7cfc9b593d3a04d650c0440292d..1654eb94a35c0f7617b5c58afceef26911900fee 100644
--- a/android/rngl.iml
+++ b/android/rngl.iml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module external.linked.project.id=":rngl" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/../Examples/Simple/android" external.system.id="GRADLE" external.system.module.group="Simple" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
+<module external.linked.project.id=":rngl" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/../Examples/AdvancedEffects/android" external.system.id="GRADLE" external.system.module.group="AdvancedEffects" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
   <component name="FacetManager">
     <facet type="android-gradle" name="Android-Gradle">
       <configuration>
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java b/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java
index d39b9d430dfa0ccb22181dda35f30579051a2633..a7e8d6c405698d451084cf678db72e59fe02ab39 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLCanvas.java
@@ -3,10 +3,13 @@ package com.projectseptember.RNGL;
 import static android.opengl.GLES20.*;
 
 import android.graphics.Bitmap;
+import android.graphics.Matrix;
 import android.graphics.PixelFormat;
 import android.net.Uri;
 import android.opengl.GLSurfaceView;
 import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.View;
 import android.view.ViewGroup;
 
 import com.facebook.imagepipeline.core.ExecutorSupplier;
@@ -47,7 +50,7 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
     private boolean autoRedraw;
     private GLData data;
     private List<Uri> imagesToPreload;
-    private List<Uri> preloaded = new ArrayList<>(); // FIXME double check that this works
+    private List<Uri> preloaded = new ArrayList<>();
 
     private Map<Uri, GLImage> images = new HashMap<>();
     private List<GLTexture> contentTextures = new ArrayList<>();
@@ -82,7 +85,7 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
 
     public GLFBO getFBO (Integer id) {
         if (!fbos.containsKey(id)) {
-            fbos.put(id, new GLFBO());
+            fbos.put(id, new GLFBO(this));
         }
         return fbos.get(id);
     }
@@ -100,7 +103,11 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
     public void onSurfaceCreated(GL10 gl, EGLConfig config) {
         fbos = new HashMap<>();
         shaders = new HashMap<>();
-        // TODO : need to reset GLImage and GLTexture. in a smart way (images if already loaded just need to re-set the bitmap)
+        images = new HashMap<>();
+        contentTextures = new ArrayList<>();
+        contentBitmaps = new ArrayList<>();
+        renderData = null;
+        requestSyncData();
     }
 
     @Override
@@ -248,6 +255,25 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
         });
     }
 
+    public static Bitmap captureView (View view) {
+        int w = view.getWidth();
+        int h = view.getHeight();
+        if (w <= 0 || h <= 0)
+            return Bitmap.createBitmap(2, 2, Bitmap.Config.ARGB_8888);
+        Bitmap bitmap = view.getDrawingCache();
+        if (bitmap == null)
+            view.setDrawingCacheEnabled(true);
+        bitmap = view.getDrawingCache();
+        if (bitmap == null) {
+            Log.e("GLCanvas", "view.getDrawingCache() is null. view="+view);
+            return Bitmap.createBitmap(2, 2, Bitmap.Config.ARGB_8888);
+        }
+        Matrix matrix = new Matrix();
+        matrix.postScale(1, -1);
+        Bitmap reversed = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
+        return reversed;
+    }
+
     /**
      * Snapshot the content views and save to contentBitmaps (must run in UI Thread)
      */
@@ -256,11 +282,19 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
         ViewGroup parent = (ViewGroup) this.getParent();
         int count = parent == null ? 0 : parent.getChildCount() - 1;
         for (int i = 0; i < count; i++) {
-            bitmaps.add(GLTexture.captureView(parent.getChildAt(i)));
+            View view = parent.getChildAt(i);
+            if (view instanceof ViewGroup) {
+                ViewGroup group = (ViewGroup) view;
+                if (group.getChildCount() == 1) {
+                    // If the content container only contain one other container,
+                    // we will use it for rasterization. That way we screenshot without cropping.
+                    view = group.getChildAt(0);
+                }
+            }
+            bitmaps.add(captureView(view));
         }
         contentBitmaps = bitmaps;
 
-        //Log.i("GLCanvas", "syncContentBitmaps "+count+" "+parent);
         return count;
     }
 
@@ -271,12 +305,10 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
         int size = Math.min(contentTextures.size(), contentBitmaps.size());
         for (int i=0; i<size; i++)
             contentTextures.get(i).setPixels(contentBitmaps.get(i));
-        //Log.i("GLCanvas", "syncContentTextures "+size);
         return size;
     }
 
     public void resizeUniformContentTextures (int n) {
-        //Log.i("GLCanvas", "reiszeUniformContentTextures "+n);
         int length = contentTextures.size();
         if (length == n) return;
         if (n < length) {
@@ -284,7 +316,7 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
         }
         else {
             for (int i = contentTextures.size(); i < n; i++) {
-                contentTextures.add(new GLTexture());
+                contentTextures.add(new GLTexture(this));
             }
         }
     }
@@ -293,6 +325,7 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
     private int countPreloaded () {
         int nb = 0;
         for (Uri toload: imagesToPreload) {
+            Log.i("GLCanvas", "toload: "+toload.getPath()+" = "+preloaded.contains(toload));
             if (preloaded.contains(toload)) {
                 nb++;
             }
@@ -380,13 +413,11 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
                 uniformsInteger.put(uniformName, units++);
 
                 if (dataUniforms.isNull(uniformName)) {
-                    GLTexture emptyTexture = new GLTexture();
+                    GLTexture emptyTexture = new GLTexture(this);
                     emptyTexture.setPixelsEmpty();
                     textures.put(uniformName, emptyTexture);
                 }
                 else {
-                    // FIXME: in case of require() it's now a number...
-                    // TODO: need to support this. as well as on iOS side
                     ReadableMap value = dataUniforms.getMap(uniformName);
                     String t = value.getString("type");
                     if (t.equals("content")) {
@@ -640,10 +671,10 @@ public class GLCanvas extends GLSurfaceView implements GLSurfaceView.Renderer, E
     }
 
 
-    private void dispatchOnProgress (double progress, int count, int total) {
+    private void dispatchOnProgress (double progress, int loaded, int total) {
         WritableMap event = Arguments.createMap();
         event.putDouble("progress", progress);
-        event.putInt("count", count);
+        event.putInt("loaded", loaded);
         event.putInt("total", total);
         ReactContext reactContext = (ReactContext)getContext();
         reactContext.getJSModule(RCTEventEmitter.class).receiveEvent(
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java b/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java
index 8a2cc48e2c74000b0784931ff683510d01fa5959..560d161a9203ea19d57544b8b1d1258257d20af3 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLCanvasManager.java
@@ -8,10 +8,13 @@ import com.facebook.imagepipeline.memory.PoolConfig;
 import com.facebook.imagepipeline.memory.PoolFactory;
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.ReadableMap;
+import com.facebook.react.common.MapBuilder;
 import com.facebook.react.uimanager.SimpleViewManager;
 import com.facebook.react.uimanager.ThemedReactContext;
 import com.facebook.react.uimanager.ReactProp;
 
+import java.util.Map;
+
 
 public class GLCanvasManager extends SimpleViewManager<GLCanvas> {
 
@@ -77,4 +80,14 @@ public class GLCanvasManager extends SimpleViewManager<GLCanvas> {
         }
         return new GLCanvas(context, executorSupplier);
     }
+
+    @Override
+    public @Nullable Map getExportedCustomDirectEventTypeConstants() {
+        return MapBuilder.of(
+                "load",
+                MapBuilder.of("registrationName", "onLoad"),
+                "progress",
+                MapBuilder.of("registrationName", "onProgress")
+        );
+    }
 }
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLFBO.java b/android/src/main/java/com/projectseptember/RNGL/GLFBO.java
index 006fdb51bd4f9af538f2cbb40f24f73ef6ab87c6..db48d03cff7ef98bd883b7151a62e4cfcdef41d9 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLFBO.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLFBO.java
@@ -2,6 +2,7 @@ package com.projectseptember.RNGL;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.Executor;
 
 import static android.opengl.GLES20.*;
 
@@ -10,9 +11,32 @@ public class GLFBO {
     private int handle;
     private int width = 0;
     private int height = 0;
+    private Executor glExecutor;
+
+    /**
+     * GLFBO constructor as well as all methods must be called in GL Thread
+     * @param glExecutor is only required for finalize()
+     */
+    public GLFBO (Executor glExecutor) {
+        this.glExecutor = glExecutor;
+        FBOState state = new FBOState();
+
+        int[] handleArr = new int[1];
+        glGenFramebuffers(1, handleArr, 0);
+        handle = handleArr[0];
+
+        int numColors = 1;
+
+        glBindFramebuffer(GL_FRAMEBUFFER, handle);
+
+        for(int i=0; i<numColors; ++i) {
+            color.add(initTexture(width, height, GL_COLOR_ATTACHMENT0 + i));
+        }
+        state.restore();
+    }
 
-    private static GLTexture initTexture (int width, int height, int attachment) {
-        GLTexture texture = new GLTexture();
+    private GLTexture initTexture (int width, int height, int attachment) {
+        GLTexture texture = new GLTexture(glExecutor);
         texture.bind();
         texture.setShape(width, height);
         glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, texture.getHandle(), 0);
@@ -22,40 +46,38 @@ public class GLFBO {
     class FBOState {
 
         private int fbo;
+        private int rbo;
+        private int tex;
 
         public FBOState() {
             int[] fbo = new int[1];
+            int[] rbo = new int[1];
+            int[] tex = new int[1];
             glGetIntegerv(GL_FRAMEBUFFER_BINDING, fbo, 0);
+            glGetIntegerv(GL_RENDERBUFFER_BINDING, rbo, 0);
+            glGetIntegerv(GL_TEXTURE_BINDING_2D, tex, 0);
             this.fbo = fbo[0];
+            this.rbo = rbo[0];
+            this.tex = tex[0];
         }
 
         private void restore() {
             glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+            glBindRenderbuffer(GL_RENDERBUFFER, rbo);
+            glBindTexture(GL_TEXTURE_2D, tex);
         }
     }
 
-    public GLFBO() {
-        FBOState state = new FBOState();
-
-        int[] handleArr = new int[1];
-        glGenFramebuffers(1, handleArr, 0);
-        handle = handleArr[0];
-
-        int numColors = 1;
-
-        glBindFramebuffer(GL_FRAMEBUFFER, handle);
-
-        for(int i=0; i<numColors; ++i) {
-            color.add(initTexture(width, height, GL_COLOR_ATTACHMENT0 + i));
-        }
-        state.restore();
-    }
-
     @Override
     protected void finalize() throws Throwable {
         super.finalize();
-        int[] handleArr = new int[] { handle };
-        glDeleteFramebuffers(1, handleArr, 0);
+        glExecutor.execute(new Runnable() {
+            @Override
+            public void run() {
+                int[] handleArr = new int[]{handle};
+                glDeleteFramebuffers(1, handleArr, 0);
+            }
+        });
     }
 
 
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLImage.java b/android/src/main/java/com/projectseptember/RNGL/GLImage.java
index 2aa8f652959de675931df7730d5a2966c99a3ef6..f664f3905b0249c09e5675a42f6ec535ecd507fc 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLImage.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLImage.java
@@ -35,7 +35,7 @@ public class GLImage {
         this.onLoad = onLoad;
         this.glExecutor = glExecutor;
         this.decodeExecutor = decodeExecutor;
-        this.texture = new GLTexture();
+        this.texture = new GLTexture(glExecutor);
     }
 
     public void setSrc (Uri src) {
@@ -71,6 +71,7 @@ public class GLImage {
         Matrix matrix = new Matrix();
         matrix.postScale(1, -1);
         final Bitmap bitmap = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
+        bitmap.setHasAlpha(true);
         glExecutor.execute(new Runnable() {
             public void run() {
                 texture.setPixels(bitmap);
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLShader.java b/android/src/main/java/com/projectseptember/RNGL/GLShader.java
index 59359fa9c83a9600b385a7b471da6b714c6a87a8..e19dab7c8af9e0183fe2264b16463ebde5d436d7 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLShader.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLShader.java
@@ -37,7 +37,7 @@ public class GLShader {
     protected void finalize() throws Throwable {
         super.finalize();
         if (buffer != null) {
-            glDeleteProgram(program); // FIXME: will this ever work? gl calls must be done in GL Thread...
+            glDeleteProgram(program);
             glDeleteBuffers(1, buffer, 0);
         }
     }
diff --git a/android/src/main/java/com/projectseptember/RNGL/GLTexture.java b/android/src/main/java/com/projectseptember/RNGL/GLTexture.java
index 93da52f72477e361f126423dbb2409e52e2a4de3..a6626cba275871c8318f6b64c48ac755994fde52 100644
--- a/android/src/main/java/com/projectseptember/RNGL/GLTexture.java
+++ b/android/src/main/java/com/projectseptember/RNGL/GLTexture.java
@@ -6,22 +6,35 @@ import android.graphics.Matrix;
 import android.opengl.GLUtils;
 import android.view.View;
 
+import java.util.concurrent.Executor;
+
 import static android.opengl.GLES20.*;
 
 public class GLTexture {
     private int handle;
     private Bitmap bitmapCurrentlyUploaded = null;
+    private Executor glExecutor;
 
-    public GLTexture () {
+    /**
+     * GLTexture constructor as well as all methods must be called in GL Thread
+     * @param glExecutor is only required for finalize()
+     */
+    public GLTexture (Executor glExecutor) {
+        this.glExecutor = glExecutor;
         makeTexture();
     }
 
     @Override
     protected void finalize() throws Throwable {
         super.finalize();
-        int[] handleArr = new int[] { handle };
-        glDeleteTextures(1, handleArr, 0);
         bitmapCurrentlyUploaded = null;
+        glExecutor.execute(new Runnable() {
+            @Override
+            public void run() {
+                int[] handleArr = new int[] { handle };
+                glDeleteTextures(1, handleArr, 0);
+            }
+        });
     }
 
     private void makeTexture () {
@@ -77,20 +90,6 @@ public class GLTexture {
         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, null);
     }
 
-    public static Bitmap captureView (View view) {
-        int w = view.getWidth();
-        int h = view.getHeight();
-        if (w <= 0 || h <= 0) return Bitmap.createBitmap(2, 2, Bitmap.Config.ARGB_8888);
-        Bitmap bitmap = view.getDrawingCache();
-        if (bitmap == null)
-            view.setDrawingCacheEnabled(true);
-        bitmap = view.getDrawingCache();
-        Matrix matrix = new Matrix();
-        matrix.postScale(1, -1);
-        Bitmap transformedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
-        return transformedBitmap;
-    }
-
     public int getHandle() {
         return handle;
     }