diff --git a/Nodes/11 Image Modifier (Post Process)/Chromatic Aberration.clbnode b/Nodes/11 Image Modifier (Post Process)/Chromatic Aberration.clbnode
index cd5a9518..201d0268 100644
--- a/Nodes/11 Image Modifier (Post Process)/Chromatic Aberration.clbnode	
+++ b/Nodes/11 Image Modifier (Post Process)/Chromatic Aberration.clbnode	
@@ -1,11 +1,11 @@
-INPUT UV->sRGB 'Image';
+INPUT UV->sRGB_PremultipliedA 'Image';
 INPUT Point2D 'Center';
 
 INPUT int 'Sample Count';
 INPUT float 'Blur';
 INPUT float 'Falloff';
 
-sRGB main(UV uv)
+sRGB_PremultipliedA main(UV uv)
 {
     float inverse_sample_count = 1.0 / 'Sample Count';
 
@@ -21,14 +21,21 @@ sRGB main(UV uv)
         velocity * 4.0 * inverse_sample_count
     );
 
-    vec3   accumulator = vec3(0);
+    vec4   accumulator = vec4(0);
     mat3x2 offsets     = mat3x2(0);
 
     for (int i = 0; i < 'Sample Count'; i++)
     {
-        accumulator.g += 'Image'(uv + offsets[1]).g;
-        accumulator.b += 'Image'(uv + offsets[2]).b;
-        accumulator.r += 'Image'(uv + offsets[0]).r;
+        vec4 color0 = 'Image'(uv + offsets[0]);
+        vec4 color1 = 'Image'(uv + offsets[1]);
+        vec4 color2 = 'Image'(uv + offsets[2]);
+        accumulator.r += color0.r;
+        accumulator.g += color1.g;
+        accumulator.b += color2.b;
+        accumulator.a += (color0.a
+                          + color1.a
+                          + color2.a)
+                         / 3.;
 
         offsets -= increments;
     }
diff --git a/Nodes/11 Image Modifier (Post Process)/LED Screen.clbnode b/Nodes/11 Image Modifier (Post Process)/LED Screen.clbnode
new file mode 100644
index 00000000..c250fc99
--- /dev/null
+++ b/Nodes/11 Image Modifier (Post Process)/LED Screen.clbnode	
@@ -0,0 +1,42 @@
+INPUT UV->sRGB_StraightA 'Image';
+INPUT float 'BOB';
+INPUT float 'BAB';
+INPUT float 'Off';
+
+float sat(float x)
+{
+    return clamp(x, 0., 1.);
+}
+vec3 sat(vec3 v)
+{
+    return vec3(sat(v.x), sat(v.y), sat(v.z));
+}
+
+vec3 pow3(vec3 v, float p)
+{
+    return vec3(pow(v.x, p), pow(v.y, p), pow(v.z, p));
+}
+
+sRGB_StraightA main(UV uv)
+{
+    vec2 r = vec2(_aspect_ratio, 1.);
+
+    float x    = cos(uv.x * PI * 'BOB' * r.x);
+    float y    = cos(uv.x * PI * 'BOB' * r.x + 'Off');
+    float z    = cos(uv.x * PI * 'BOB' * r.x + 'Off' * 2);
+    vec3  grid = sat(vec3(x, y, z));
+    grid       = pow3(grid, 'BAB');
+    // grid       = sat(grid - .3);
+    // grid       = pow3(grid, .5);
+    float g = pow(abs(cos(uv.y * PI * 'BOB' * r.y)), .3);
+    grid *= g;
+    grid *= 1.5;
+
+    uv = round(uv * 'BOB' * r) / ('BOB' * r);
+
+    vec3 c = 'Image'(uv).rgb;
+
+    vec3 col = grid * c;
+
+    return vec4(col, 1.0);
+}
\ No newline at end of file
diff --git a/Nodes/11 Image Modifier (Post Process)/Posterize.clbnode b/Nodes/11 Image Modifier (Post Process)/Posterize.clbnode
index a0385f62..39cbb5da 100644
--- a/Nodes/11 Image Modifier (Post Process)/Posterize.clbnode	
+++ b/Nodes/11 Image Modifier (Post Process)/Posterize.clbnode	
@@ -1,10 +1,11 @@
 INPUT float 'Levels';
-INPUT UV->sRGB 'Image';
+INPUT UV->sRGB_StraightA 'Image';
 
-sRGB main(UV uv)
+sRGB_StraightA main(UV uv)
 {
     if ('Levels' == 1.f)
-        return vec3(0.f);
+        return vec4(vec3(0.f), 'Image'(uv).a);
 
-    return vec3(floor('Image'(uv) * 'Levels') / ('Levels' - 1.));
+    vec4 color = 'Image'(uv);
+    return vec4(vec3(floor(color.rgb * 'Levels') / ('Levels' - 1.)), color.a);
 }
\ No newline at end of file
diff --git a/Nodes/11 Image Modifier (Post Process)/Set Opacity (Alpha).clbnode b/Nodes/11 Image Modifier (Post Process)/Set Opacity (Alpha).clbnode
index ac542b6c..f1f8f642 100644
--- a/Nodes/11 Image Modifier (Post Process)/Set Opacity (Alpha).clbnode	
+++ b/Nodes/11 Image Modifier (Post Process)/Set Opacity (Alpha).clbnode	
@@ -2,8 +2,7 @@
 
 INPUT float 'Opacity';
 
-Oklab_StraightA main(Oklab_StraightA Image)
+Oklab_PremultipliedA main(Oklab_PremultipliedA Image)
 {
-    Image.a = 'Opacity';
-    return Image;
+    return Image * 'Opacity';
 }
\ No newline at end of file
diff --git a/Nodes/11 Image Modifier (Post Process)/Set Opacity (Alpha).clbnode.presets.json b/Nodes/11 Image Modifier (Post Process)/Set Opacity (Alpha).clbnode.presets.json
new file mode 100644
index 00000000..8267cfc6
--- /dev/null
+++ b/Nodes/11 Image Modifier (Post Process)/Set Opacity (Alpha).clbnode.presets.json	
@@ -0,0 +1,42 @@
+{
+    "Presets": {
+        "Underlying container": [
+            {
+                "first": "73c034ed-8075-46ef-a8a4-bc8a3bc1542d",
+                "second": {
+                    "Name": "Default",
+                    "Values": [
+                        {
+                            "index": 2,
+                            "data": {
+                                "Name": "Opacity",
+                                "Value": 0.5,
+                                "Metadata": {
+                                    "Bounds": {
+                                        "Has min bound": true,
+                                        "Min": 0.0,
+                                        "Has max bound": true,
+                                        "Max": 1.0,
+                                        "Drag speed": 0.009999999776482582,
+                                        "Use slider": true
+                                    }
+                                },
+                                "Default Value": 0.0,
+                                "Default Metadata": {
+                                    "Bounds": {
+                                        "Has min bound": false,
+                                        "Min": 0.0,
+                                        "Has max bound": false,
+                                        "Max": 1.0,
+                                        "Drag speed": 0.009999999776482582,
+                                        "Use slider": false
+                                    }
+                                }
+                            }
+                        }
+                    ]
+                }
+            }
+        ]
+    }
+}
\ No newline at end of file