diff --git a/CloneSource.cpp b/CloneSource.cpp
index 1155a56..741487d 100644
--- a/CloneSource.cpp
+++ b/CloneSource.cpp
@@ -163,6 +163,9 @@ void CloneSource::setFilter(FrameBufferFilter::Type T)
     case FrameBufferFilter::FILTER_SHARPEN:
         filter_ = new SharpenFilter;
         break;
+    case FrameBufferFilter::FILTER_SMOOTH:
+        filter_ = new SmoothFilter;
+        break;
     case FrameBufferFilter::FILTER_EDGE:
         filter_ = new EdgeFilter;
         break;
diff --git a/FrameBufferFilter.cpp b/FrameBufferFilter.cpp
index 4ee7b0f..efcd847 100644
--- a/FrameBufferFilter.cpp
+++ b/FrameBufferFilter.cpp
@@ -6,7 +6,7 @@
 #include "FrameBufferFilter.h"
 
 const char* FrameBufferFilter::type_label[FrameBufferFilter::FILTER_INVALID] = {
-    "None", "Delay", "Resample", "Blur", "Sharpen", "Edge", "Transparency", "Shader code"
+    "None", "Delay", "Resample", "Blur", "Sharpen", "Smooth & Noise", "Edge", "Transparency", "Custom shader"
 };
 
 FrameBufferFilter::FrameBufferFilter() : enabled_(true), input_(nullptr)
diff --git a/FrameBufferFilter.h b/FrameBufferFilter.h
index faad623..11a0743 100644
--- a/FrameBufferFilter.h
+++ b/FrameBufferFilter.h
@@ -23,6 +23,7 @@ public:
         FILTER_RESAMPLE,
         FILTER_BLUR,
         FILTER_SHARPEN,
+        FILTER_SMOOTH,
         FILTER_EDGE,
         FILTER_ALPHA,
         FILTER_IMAGE,
diff --git a/ImGuiVisitor.cpp b/ImGuiVisitor.cpp
index 6ca8087..c8b2712 100644
--- a/ImGuiVisitor.cpp
+++ b/ImGuiVisitor.cpp
@@ -851,6 +851,51 @@ void ImGuiVisitor::visit (SharpenFilter& f)
     }
 }
 
+void ImGuiVisitor::visit (SmoothFilter& f)
+{
+    std::ostringstream oss;
+    oss << "Smooth ";
+
+    // Method selection
+    if (ImGuiToolkit::IconButton(14, 8)) {
+        f.setMethod( 0 );
+        oss << SmoothFilter::method_label[0];
+        Action::manager().store(oss.str());
+    }
+    ImGui::SameLine(0, IMGUI_SAME_LINE);
+    ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
+    int m = (int) f.method();
+    if (ImGui::Combo("Method", &m, SmoothFilter::method_label, IM_ARRAYSIZE(SmoothFilter::method_label) )) {
+        f.setMethod( m );
+        oss << SmoothFilter::method_label[m];
+        Action::manager().store(oss.str());
+    }
+
+    // List of parameters
+    std::map<std::string, float> filter_parameters = f.program().parameters();
+    for (auto param = filter_parameters.begin(); param != filter_parameters.end(); ++param)
+    {
+        ImGui::PushID( param->first.c_str() );
+        float v = param->second;
+        if (ImGuiToolkit::IconButton(13, 14)) {
+            v = 0.f;
+            f.setProgramParameter(param->first, v);
+        }
+        ImGui::SameLine(0, IMGUI_SAME_LINE);
+        ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
+        if (ImGui::SliderFloat( param->first.c_str(), &v, 0.f, 1.f, "%.2f")) {
+            f.setProgramParameter(param->first, v);
+        }
+        if (ImGui::IsItemDeactivatedAfterEdit()) {
+            oss << EdgeFilter::method_label[ f.method() ];
+            oss << " : " << param->first << " " << std::setprecision(3) <<param->second;
+            Action::manager().store(oss.str());
+        }
+        ImGui::PopID();
+    }
+}
+
+
 void ImGuiVisitor::visit (EdgeFilter& f)
 {
     std::ostringstream oss;
@@ -988,47 +1033,47 @@ void ImGuiVisitor::visit (ImageFilter& f)
         FilteringProgram target;
         f.setProgram( target );
     }
-    ImGui::SameLine(0, IMGUI_SAME_LINE);
-    ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
-    if (ImGui::BeginCombo("Algorithm", f.program().name().c_str()) )
-    {
-        for (auto p = FilteringProgram::presets.begin(); p != FilteringProgram::presets.end(); ++p){
-            if (ImGui::Selectable( p->name().c_str() )) {
-                // apply the selected filter to the source
-                f.setProgram( *p );
-            }
-        }
-        ImGui::EndCombo();
-    }
+//    ImGui::SameLine(0, IMGUI_SAME_LINE);
+//    ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
+//    if (ImGui::BeginCombo("Algorithm", f.program().name().c_str()) )
+//    {
+//        for (auto p = FilteringProgram::presets.begin(); p != FilteringProgram::presets.end(); ++p){
+//            if (ImGui::Selectable( p->name().c_str() )) {
+//                // apply the selected filter to the source
+//                f.setProgram( *p );
+//            }
+//        }
+//        ImGui::EndCombo();
+//    }
 
-    // List of parameters
-    std::map<std::string, float> filter_parameters = f.program().parameters();
-    for (auto param = filter_parameters.begin(); param != filter_parameters.end(); ++param)
-    {
-        ImGui::PushID( param->first.c_str() );
-        float v = param->second;
-        if (ImGuiToolkit::IconButton(13, 14)) {
-            v = 0.f;
-            f.setProgramParameter(param->first, v);
-        }
-        ImGui::SameLine(0, IMGUI_SAME_LINE);
-        ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
-        if (ImGui::SliderFloat( param->first.c_str(), &v, 0.f, 1.f, "%.2f")) {
-            f.setProgramParameter(param->first, v);
-        }
-        if (ImGui::IsItemDeactivatedAfterEdit()) {
-            // TODO UNDO
-            //            std::ostringstream oss;
-            //            oss << "Delay " << std::setprecision(3) << d << " s";
-            //            Action::manager().store(oss.str());
-        }
-        ImGui::PopID();
-    }
+//    // List of parameters
+//    std::map<std::string, float> filter_parameters = f.program().parameters();
+//    for (auto param = filter_parameters.begin(); param != filter_parameters.end(); ++param)
+//    {
+//        ImGui::PushID( param->first.c_str() );
+//        float v = param->second;
+//        if (ImGuiToolkit::IconButton(13, 14)) {
+//            v = 0.f;
+//            f.setProgramParameter(param->first, v);
+//        }
+//        ImGui::SameLine(0, IMGUI_SAME_LINE);
+//        ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
+//        if (ImGui::SliderFloat( param->first.c_str(), &v, 0.f, 1.f, "%.2f")) {
+//            f.setProgramParameter(param->first, v);
+//        }
+//        if (ImGui::IsItemDeactivatedAfterEdit()) {
+//            // TODO UNDO
+//            //            std::ostringstream oss;
+//            //            oss << "Delay " << std::setprecision(3) << d << " s";
+//            //            Action::manager().store(oss.str());
+//        }
+//        ImGui::PopID();
+//    }
 
     // Open Editor
-    ImGuiToolkit::IconButton(18, 18);
+//    ImGuiToolkit::IconButton(18, 18);
     ImGui::SameLine(0, IMGUI_SAME_LINE);
-    if ( ImGui::Button( ICON_FA_CODE "  Edit", ImVec2(IMGUI_RIGHT_ALIGN, 0)) )
+    if ( ImGui::Button( ICON_FA_CODE "  Open editor", ImVec2(IMGUI_RIGHT_ALIGN, 0)) )
         Settings::application.widget.shader_editor = true;
     ImGui::SameLine(0, IMGUI_SAME_LINE);
     ImGui::Text("Code");
@@ -1068,7 +1113,7 @@ void ImGuiVisitor::visit (CloneSource& s)
     ImGui::SameLine(0, IMGUI_SAME_LINE);
     ImGui::SetNextItemWidth(IMGUI_RIGHT_ALIGN);
     int type = (int) s.filter()->type();
-    if (ImGui::Combo("Filter", &type, FrameBufferFilter::type_label, IM_ARRAYSIZE(FrameBufferFilter::type_label) )) {
+    if (ImGui::Combo("Filter", &type, FrameBufferFilter::type_label, IM_ARRAYSIZE(FrameBufferFilter::type_label), FrameBufferFilter::FILTER_INVALID)) {
         s.setFilter( FrameBufferFilter::Type(type) );
         oss << ": Filter " << FrameBufferFilter::type_label[type];
         Action::manager().store(oss.str());
diff --git a/ImGuiVisitor.h b/ImGuiVisitor.h
index be93dd8..2026e75 100644
--- a/ImGuiVisitor.h
+++ b/ImGuiVisitor.h
@@ -42,6 +42,7 @@ public:
     void visit (ResampleFilter&) override;
     void visit (BlurFilter&) override;
     void visit (SharpenFilter&) override;
+    void visit (SmoothFilter&) override;
     void visit (EdgeFilter&) override;
     void visit (AlphaFilter&) override;
     void visit (ImageFilter&) override;
diff --git a/ImageFilter.cpp b/ImageFilter.cpp
index 900b88f..3658682 100644
--- a/ImageFilter.cpp
+++ b/ImageFilter.cpp
@@ -78,23 +78,13 @@ std::string fragmentFooter = "void main() {\n"
 
 std::list< FilteringProgram > FilteringProgram::presets = {
     FilteringProgram(),
-    FilteringProgram("Unfocus",  "shaders/filters/focus.glsl",      "",     { { "Factor", 0.5} }),
-    FilteringProgram("Smooth",   "shaders/filters/bilinear.glsl",   "",     { }),
-    FilteringProgram("Kuwahara", "shaders/filters/kuwahara.glsl",   "",     { { "Radius", 1.0} }),
-    FilteringProgram("Denoise",  "shaders/filters/denoise.glsl",    "",     { { "Threshold", 0.5} }),
-    FilteringProgram("Noise",    "shaders/filters/noise.glsl",      "",     { { "Amount", 0.25} }),
-    FilteringProgram("Grain",    "shaders/filters/grain.glsl",      "",     { { "Amount", 0.5} }),
+    FilteringProgram("Bilateral","shaders/filters/bilinear.glsl",   "",     { }),
     FilteringProgram("Pixelate", "shaders/filters/pixelate.glsl",   "",     { { "Size", 0.5}, { "Sharpen", 0.5} }),
-    FilteringProgram("Erosion",  "shaders/filters/erosion.glsl",    "",     { { "Radius", 0.5} }),
-    FilteringProgram("Dilation", "shaders/filters/dilation.glsl",   "",     { { "Radius", 0.5} }),
-    FilteringProgram("Openning", "shaders/filters/erosion.glsl",    "shaders/filters/dilation.glsl",  { { "Radius", 0.5} }),
-    FilteringProgram("Closing",  "shaders/filters/dilation.glsl",   "shaders/filters/erosion.glsl",   { { "Radius", 0.5} }),
     FilteringProgram("Bloom",    "shaders/filters/bloom.glsl",      "",     { { "Intensity", 0.5} }),
     FilteringProgram("Bokeh",    "shaders/filters/bokeh.glsl",      "",     { { "Radius", 1.0} }),
     FilteringProgram("Chalk",    "shaders/filters/talk.glsl",       "",     { { "Factor", 1.0} }),
     FilteringProgram("Stippling","shaders/filters/stippling.glsl",  "",     { { "Factor", 0.5} }),
     FilteringProgram("Dithering","shaders/filters/dithering.glsl",  "",     { { "Factor", 0.5} }),
-    FilteringProgram("Chromakey","shaders/filters/chromakey.glsl",  "",     { { "Red", 0.05}, { "Green", 0.63}, { "Blue", 0.14}, { "Tolerance", 0.54} }),
     FilteringProgram("Fisheye",  "shaders/filters/fisheye.glsl",    "",     { { "Factor", 0.35} }),
 };
 
@@ -693,7 +683,7 @@ const char* SharpenFilter::method_label[SharpenFilter::SHARPEN_INVALID] = {
 };
 
 std::vector< FilteringProgram > SharpenFilter::programs_ = {
-    FilteringProgram("Unsharp Mask", "shaders/filters/sharpen_1.glsl",  "shaders/filters/sharpen_2.glsl",     { { "Amount", 0.5} }),
+    FilteringProgram("UnsharpMask", "shaders/filters/sharpen_1.glsl",  "shaders/filters/sharpen_2.glsl",     { { "Amount", 0.5} }),
     FilteringProgram("Sharpen",      "shaders/filters/sharpen.glsl",    "",   { { "Amount", 0.5} }),
     FilteringProgram("Sharp Edge",   "shaders/filters/sharpenedge.glsl","",   { { "Amount", 0.5} }),
     FilteringProgram("TopHat",       "shaders/filters/erosion.glsl",    "shaders/filters/tophat.glsl",    { { "Radius", 0.5} }),
@@ -726,6 +716,55 @@ void SharpenFilter::accept (Visitor& v)
 }
 
 
+
+////////////////////////////////////////
+/////                                 //
+////  SMOOTHING FILTERS              ///
+///                                 ////
+////////////////////////////////////////
+
+const char* SmoothFilter::method_label[SmoothFilter::SMOOTH_INVALID] = {
+    "Bilateral", "Kuwahara", "Opening", "Closing", "Erosion", "Dilation", "Remove noise", "Add noise", "Add grain"
+};
+
+std::vector< FilteringProgram > SmoothFilter::programs_ = {
+    FilteringProgram("Bilateral","shaders/filters/focus.glsl",      "",     { { "Factor", 0.5} }),
+    FilteringProgram("Kuwahara", "shaders/filters/kuwahara.glsl",   "",     { { "Radius", 1.0} }),
+    FilteringProgram("Opening",  "shaders/filters/erosion.glsl",    "shaders/filters/dilation.glsl",  { { "Radius", 0.5} }),
+    FilteringProgram("Closing",  "shaders/filters/dilation.glsl",   "shaders/filters/erosion.glsl",   { { "Radius", 0.5} }),
+    FilteringProgram("Erosion",  "shaders/filters/erosion.glsl",    "",     { { "Radius", 0.5} }),
+    FilteringProgram("Dilation", "shaders/filters/dilation.glsl",   "",     { { "Radius", 0.5} }),
+    FilteringProgram("Denoise",  "shaders/filters/denoise.glsl",    "",     { { "Threshold", 0.5} }),
+    FilteringProgram("Noise",    "shaders/filters/noise.glsl",      "",     { { "Amount", 0.25} }),
+    FilteringProgram("Grain",    "shaders/filters/grain.glsl",      "",     { { "Amount", 0.5} })
+};
+
+SmoothFilter::SmoothFilter (): ImageFilter(), method_(SMOOTH_INVALID)
+{
+}
+
+void SmoothFilter::setMethod(int method)
+{
+    method_ = (SmoothMethod) CLAMP(method, SMOOTH_BILINEAR, SMOOTH_INVALID-1);
+    setProgram( programs_[ (int) method_] );
+}
+
+void SmoothFilter::draw (FrameBuffer *input)
+{
+    // Default
+    if (method_ == SMOOTH_INVALID)
+        setMethod( SMOOTH_BILINEAR );
+
+    ImageFilter::draw( input );
+}
+
+void SmoothFilter::accept (Visitor& v)
+{
+    FrameBufferFilter::accept(v);
+    v.visit(*this);
+}
+
+
 ////////////////////////////////////////
 /////                                 //
 ////  EDGE FILTERS                   ///
diff --git a/ImageFilter.h b/ImageFilter.h
index 5569fc8..ca4c9b7 100644
--- a/ImageFilter.h
+++ b/ImageFilter.h
@@ -198,6 +198,41 @@ private:
 };
 
 
+class SmoothFilter : public ImageFilter
+{
+public:
+
+    SmoothFilter();
+
+    // Algorithms used for smoothing
+    typedef enum {
+        SMOOTH_BILINEAR = 0,
+        SMOOTH_KUWAHARA,
+        SMOOTH_OPENING,
+        SMOOTH_CLOSING,
+        SMOOTH_EROSION,
+        SMOOTH_DILATION,
+        SMOOTH_DENOISE,
+        SMOOTH_ADDNOISE,
+        SMOOTH_ADDGRAIN,
+        SMOOTH_INVALID
+    } SmoothMethod;
+    static const char* method_label[SMOOTH_INVALID];
+    SmoothMethod method () const { return method_; }
+    void setMethod(int method);
+
+    // implementation of FrameBufferFilter
+    Type type() const override { return FrameBufferFilter::FILTER_SMOOTH; }
+
+    void draw   (FrameBuffer *input) override;
+    void accept (Visitor& v) override;
+
+private:
+    SmoothMethod method_;
+    static std::vector< FilteringProgram > programs_;
+};
+
+
 class EdgeFilter : public ImageFilter
 {
 public:
diff --git a/SessionCreator.cpp b/SessionCreator.cpp
index 600543d..3de0f1d 100644
--- a/SessionCreator.cpp
+++ b/SessionCreator.cpp
@@ -1275,6 +1275,30 @@ void SessionLoader::visit (SharpenFilter& f)
     f.setProgramParameters(filter_params);
 }
 
+void SessionLoader::visit (SmoothFilter& f)
+{
+    int m = 0;
+    xmlCurrent_->QueryIntAttribute("method", &m);
+    f.setMethod(m);
+
+    std::map< std::string, float > filter_params;
+    XMLElement* parameters = xmlCurrent_->FirstChildElement("parameters");
+    if (parameters) {
+        XMLElement* param = parameters->FirstChildElement("uniform");
+        for( ; param ; param = param->NextSiblingElement())
+        {
+            float val = 0.f;
+            param->QueryFloatAttribute("value", &val);
+            const char * name;
+            param->QueryStringAttribute("name", &name);
+            if (name)
+                filter_params[name] = val;
+        }
+    }
+
+    f.setProgramParameters(filter_params);
+}
+
 void SessionLoader::visit (EdgeFilter& f)
 {
     int m = 0;
diff --git a/SessionCreator.h b/SessionCreator.h
index e971bfd..12bc38f 100644
--- a/SessionCreator.h
+++ b/SessionCreator.h
@@ -68,6 +68,7 @@ public:
     void visit (BlurFilter&) override;
     void visit (SharpenFilter&) override;
     void visit (EdgeFilter&) override;
+    void visit (SmoothFilter&) override;
     void visit (AlphaFilter&) override;
     void visit (ImageFilter&) override;
 
diff --git a/SessionVisitor.cpp b/SessionVisitor.cpp
index ebecfe3..336d24d 100644
--- a/SessionVisitor.cpp
+++ b/SessionVisitor.cpp
@@ -725,6 +725,22 @@ void SessionVisitor::visit (SharpenFilter& f)
     }
 }
 
+void SessionVisitor::visit (SmoothFilter& f)
+{
+    xmlCurrent_->SetAttribute("method", (int) f.method());
+
+    std::map< std::string, float > filter_params = f.program().parameters();
+    XMLElement *parameters = xmlDoc_->NewElement( "parameters" );
+    xmlCurrent_->InsertEndChild(parameters);
+    for (auto p = filter_params.begin(); p != filter_params.end(); ++p)
+    {
+        XMLElement *param = xmlDoc_->NewElement( "uniform" );
+        param->SetAttribute("name", p->first.c_str() );
+        param->SetAttribute("value", p->second );
+        parameters->InsertEndChild(param);
+    }
+}
+
 void SessionVisitor::visit (EdgeFilter& f)
 {
     xmlCurrent_->SetAttribute("method", (int) f.method());
diff --git a/SessionVisitor.h b/SessionVisitor.h
index 3a39c19..fcd05ce 100644
--- a/SessionVisitor.h
+++ b/SessionVisitor.h
@@ -75,6 +75,7 @@ public:
     void visit (ResampleFilter&) override;
     void visit (BlurFilter&) override;
     void visit (SharpenFilter&) override;
+    void visit (SmoothFilter&) override;
     void visit (EdgeFilter&) override;
     void visit (AlphaFilter&) override;
     void visit (ImageFilter&) override;
diff --git a/Visitor.h b/Visitor.h
index d751ebc..da425b7 100644
--- a/Visitor.h
+++ b/Visitor.h
@@ -47,6 +47,7 @@ class DelayFilter;
 class ResampleFilter;
 class BlurFilter;
 class SharpenFilter;
+class SmoothFilter;
 class EdgeFilter;
 class AlphaFilter;
 class ImageFilter;
@@ -112,6 +113,7 @@ public:
     virtual void visit (ResampleFilter&) {}
     virtual void visit (BlurFilter&) {}
     virtual void visit (SharpenFilter&) {}
+    virtual void visit (SmoothFilter&) {}
     virtual void visit (EdgeFilter&) {}
     virtual void visit (AlphaFilter&) {}
     virtual void visit (ImageFilter&) {}
diff --git a/rsc/images/icons.dds b/rsc/images/icons.dds
index cf10a2a..6c8a230 100644
Binary files a/rsc/images/icons.dds and b/rsc/images/icons.dds differ
diff --git a/rsc/shaders/filters/dilation.glsl b/rsc/shaders/filters/dilation.glsl
index 7196bac..537dd22 100644
--- a/rsc/shaders/filters/dilation.glsl
+++ b/rsc/shaders/filters/dilation.glsl
@@ -1,9 +1,9 @@
 uniform float Radius;
 #define MAX_SIZE 5
 
-vec3 dilation (sampler2D source, vec2 uv, vec2 uv_step, float rad) {
+vec4 dilation (sampler2D source, vec2 uv, vec2 uv_step, float rad) {
     
-    vec3 maxValue = vec3(0.0);
+    vec4 maxValue = vec4(0.0);
     float R = length(vec2(rad)) ;
     float D = rad;
 
@@ -12,7 +12,7 @@ vec3 dilation (sampler2D source, vec2 uv, vec2 uv_step, float rad) {
         for (float j=-rad; j <= rad; ++j)
         {
             vec2 delta = vec2(i, j);
-            maxValue = max(texture(source, uv + delta * smoothstep(R, D, length(delta)) * uv_step ).rgb, maxValue); 
+            maxValue = max(texture(source, uv + delta * smoothstep(R, D, length(delta)) * uv_step ), maxValue);
         }
     }
 
@@ -22,5 +22,5 @@ vec3 dilation (sampler2D source, vec2 uv, vec2 uv_step, float rad) {
 void mainImage( out vec4 fragColor, in vec2 fragCoord )
 {
     vec2 uv = fragCoord.xy / iResolution.xy;
-    fragColor = vec4( dilation(iChannel0, uv, 1.0 / iResolution.xy, mix(1., MAX_SIZE, Radius)), 1.0);
+    fragColor = dilation(iChannel0, uv, 1.0 / iResolution.xy, mix(1., MAX_SIZE, Radius));
 }
diff --git a/rsc/shaders/filters/erosion.glsl b/rsc/shaders/filters/erosion.glsl
index 3993964..fe42629 100644
--- a/rsc/shaders/filters/erosion.glsl
+++ b/rsc/shaders/filters/erosion.glsl
@@ -1,9 +1,9 @@
 uniform float Radius;
 #define MAX_SIZE 5
 
-vec3 erosion (sampler2D source, vec2 uv, vec2 uv_step, float rad) 
+vec4 erosion (sampler2D source, vec2 uv, vec2 uv_step, float rad)
 {
-    vec3 minValue = vec3(1.0);  
+    vec4 minValue = vec4(1.0);
     float R = length(vec2(rad)) ;
     float D = rad;
 
@@ -12,7 +12,7 @@ vec3 erosion (sampler2D source, vec2 uv, vec2 uv_step, float rad)
         for (float j=-rad; j <= rad; ++j)
         {
             vec2 delta = vec2(i, j);
-            minValue = min(texture(source, uv + delta * smoothstep(R, D, length(delta)) * uv_step ).rgb, minValue); 
+            minValue = min(texture(source, uv + delta * smoothstep(R, D, length(delta)) * uv_step ), minValue);
         }
     }
 
@@ -22,5 +22,5 @@ vec3 erosion (sampler2D source, vec2 uv, vec2 uv_step, float rad)
 void mainImage( out vec4 fragColor, in vec2 fragCoord )
 {
     vec2 uv = fragCoord.xy / iResolution.xy;
-    fragColor = vec4( erosion(iChannel0, uv, 1.0 / iResolution.xy, mix(1., MAX_SIZE, Radius)), 1.0);
+    fragColor = erosion(iChannel0, uv, 1.0 / iResolution.xy, mix(1., MAX_SIZE, Radius));
 }
diff --git a/rsc/shaders/filters/focus.glsl b/rsc/shaders/filters/focus.glsl
index a54aff2..5368037 100644
--- a/rsc/shaders/filters/focus.glsl
+++ b/rsc/shaders/filters/focus.glsl
@@ -11,18 +11,18 @@ float normpdf(in float x, in float sigma)
     return 0.39894*exp(-0.5*x*x/(sigma*sigma))/sigma;
 }
 
-float normpdf3(in vec3 v, in float sigma)
+float normpdf3(in vec4 v, in float sigma)
 {
     return 0.39894*exp(-0.5*dot(v,v)/(sigma*sigma))/sigma;
 }
 
 void mainImage( out vec4 fragColor, in vec2 fragCoord )
 {
-    vec3 c = texture(iChannel0, (fragCoord.xy / iResolution.xy) ).rgb;
+    vec4 c = texture(iChannel0, (fragCoord.xy / iResolution.xy) );
 
     const int kSize = (MSIZE-1)/2;
     float kernel[MSIZE];
-    vec3 final_colour = vec3(0.0);
+    vec4 final_colour = vec4(0.0);
 
     //create the 1-D kernel
     float Z = 0.0;
@@ -31,7 +31,7 @@ void mainImage( out vec4 fragColor, in vec2 fragCoord )
         kernel[kSize+j] = kernel[kSize-j] = normpdf(float(j), SIGMA);
     }
 
-    vec3 cc;
+    vec4 cc;
     float fac;
     float bsigma = mix(0.01, 1.2, Factor);
     float bZ = 1.0/normpdf(0.0, bsigma);
@@ -39,14 +39,13 @@ void mainImage( out vec4 fragColor, in vec2 fragCoord )
     {
         for (int j=-kSize; j <= kSize; ++j)
         {
-            cc = texture(iChannel0, (fragCoord.xy+vec2(float(i),float(j))) / iResolution.xy).rgb;
+            cc = texture(iChannel0, (fragCoord.xy+vec2(float(i),float(j))) / iResolution.xy);
             fac = normpdf3(cc-c, bsigma)*bZ*kernel[kSize+j]*kernel[kSize+i];
             Z += fac;
             final_colour += fac*cc;
-
         }
     }
 
-    fragColor = vec4(final_colour/Z, 1.0);
+    fragColor = final_colour/Z;
 }
 
diff --git a/rsc/shaders/filters/grain.glsl b/rsc/shaders/filters/grain.glsl
index 0b61468..a73b89a 100644
--- a/rsc/shaders/filters/grain.glsl
+++ b/rsc/shaders/filters/grain.glsl
@@ -100,18 +100,16 @@ void mainImage( out vec4 fragColor, in vec2 fragCoord )
     noise.g = mix(noise.r,pnoise3D(vec3(rotCoordsG*vec2(width/grainsize,height/grainsize),1.0)),coloramount);
     noise.b = mix(noise.r,pnoise3D(vec3(rotCoordsB*vec2(width/grainsize,height/grainsize),2.0)),coloramount);
 
-    vec3 col = texture(iChannel0, texCoord).rgb;
+    vec4 col = texture(iChannel0, texCoord);
 
     //noisiness response curve based on scene luminance
     vec3 lumcoeff = vec3(0.299,0.587,0.114);
-    float luminance = lumamount * dot(col, lumcoeff);
+    float luminance = lumamount * dot(col.rgb, lumcoeff);
     float lum = smoothstep(0.2,0.0,luminance);
     lum += luminance;
 
     noise = mix(noise,vec3(0.0),pow(lum,4.0));
-    col += noise * mix(0.02, 0.4, Amount);
-
-    fragColor =  vec4(col,1.0);
+    fragColor = col + vec4(noise * mix(0.02, 0.4, Amount), col.a);
 }
 
 
diff --git a/rsc/shaders/filters/kuwahara.glsl b/rsc/shaders/filters/kuwahara.glsl
index f706ab5..6427dec 100644
--- a/rsc/shaders/filters/kuwahara.glsl
+++ b/rsc/shaders/filters/kuwahara.glsl
@@ -21,83 +21,83 @@ void mainImage( out vec4 fragColor, in vec2 fragCoord )
     ////////////////////////////////////////////////////////////////////////////////
     // Bilateral difference-check, to speed up the processing of large flat areas //
     ////////////////////////////////////////////////////////////////////////////////
-    vec3 compare = texture(iChannel0, uv).rgb;
+    vec4 compare = texture(iChannel0, uv);
     bool diffpix = false;
     for (int j = -rad; j <= rad; ++j) {
-        if (texture(iChannel0, uv + vec2(0,j) * uv_step).rgb != compare) {
+        if (texture(iChannel0, uv + vec2(0,j) * uv_step) != compare) {
             diffpix = true;
             break;
         }
     }
     if (!diffpix) {
         for (int i = -rad; i <= rad; ++i) {
-            if (texture(iChannel0, uv + vec2(i,0) * uv_step).rgb != compare) {
+            if (texture(iChannel0, uv + vec2(i,0) * uv_step) != compare) {
                 diffpix = true;
                 break;
             }
         }
     }
     if (!diffpix) {
-        outpix = vec4( texture(iChannel0, uv).rgb, 1.0);
+        outpix = compare;
     }
     ////////////////////////////////////////////////////////////////////////////////
     ////////////////////////////////////////////////////////////////////////////////
-	else {
-	    vec3 m[4];
-	    vec3 s[4];
-	    for (int k = 0; k < 4; ++k) {
-	        m[k] = vec3(0.0);
-	        s[k] = vec3(0.0);
-	    }
-	    float R = 0.1;
-    	float D = length(vec2(rad));
-	
-	    for (int j = -rad; j <= 0; ++j)  {
-	        for (int i = -rad; i <= 0; ++i)  {
+    else {
+        vec4 m[4];
+        vec4 s[4];
+        for (int k = 0; k < 4; ++k) {
+            m[k] = vec4(0.0);
+            s[k] = vec4(0.0);
+        }
+        float R = 0.1;
+        float D = length(vec2(rad));
+
+        for (int j = -rad; j <= 0; ++j)  {
+            for (int i = -rad; i <= 0; ++i)  {
                 vec2 delta = vec2(i, j);
-	            vec3 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step).rgb;
-	            m[0] += c;
-	            s[0] += c * c;
-	        }
-	    }
-	
-	    for (int j = -rad; j <= 0; ++j)  {
-	        for (int i = 0; i <= rad; ++i)  {
+                vec4 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step);
+                m[0] += c;
+                s[0] += c * c;
+            }
+        }
+
+        for (int j = -rad; j <= 0; ++j)  {
+            for (int i = 0; i <= rad; ++i)  {
                 vec2 delta = vec2(i, j);
-	            vec3 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step).rgb;
-	            m[1] += c;
-	            s[1] += c * c;
-	        }
-	    }
-	
-	    for (int j = 0; j <= rad; ++j)  {
-	        for (int i = 0; i <= rad; ++i)  {
+                vec4 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step);
+                m[1] += c;
+                s[1] += c * c;
+            }
+        }
+
+        for (int j = 0; j <= rad; ++j)  {
+            for (int i = 0; i <= rad; ++i)  {
                 vec2 delta = vec2(i, j);
-	            vec3 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step).rgb;
-	            m[2] += c;
-	            s[2] += c * c;
-	        }
-	    }
-	
-	    for (int j = 0; j <= rad; ++j)  {
-	        for (int i = -rad; i <= 0; ++i)  {
+                vec4 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step);
+                m[2] += c;
+                s[2] += c * c;
+            }
+        }
+
+        for (int j = 0; j <= rad; ++j)  {
+            for (int i = -rad; i <= 0; ++i)  {
                 vec2 delta = vec2(i, j);
-	            vec3 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step).rgb;
-	            m[3] += c;
-	            s[3] += c * c;
-	        }
-	    }
-	
-	    float min_sigma2 = 1e+2;
-	    for (int k = 0; k < 4; ++k) {
-	        m[k] /= n;
-	        s[k] = abs(s[k] / n - m[k] * m[k]);
-	        float sigma2 = s[k].r + s[k].g + s[k].b;
-	        if (sigma2 < min_sigma2) {
-	            min_sigma2 = sigma2;
-	            outpix = vec4(m[k], 1.0);
-	        }
-	    }
+                vec4 c = texture(iChannel0, uv + delta * smoothstep(R, D, length(delta)) * uv_step);
+                m[3] += c;
+                s[3] += c * c;
+            }
+        }
+
+        float min_sigma2 = 1e+2;
+        for (int k = 0; k < 4; ++k) {
+            m[k] /= n;
+            s[k] = abs(s[k] / n - m[k] * m[k]);
+            float sigma2 = s[k].r + s[k].g + s[k].b;
+            if (sigma2 < min_sigma2) {
+                min_sigma2 = sigma2;
+                outpix = m[k];
+            }
+        }
     }
 
     fragColor = outpix;
diff --git a/rsc/shaders/filters/noise.glsl b/rsc/shaders/filters/noise.glsl
index 7927ede..f14692d 100644
--- a/rsc/shaders/filters/noise.glsl
+++ b/rsc/shaders/filters/noise.glsl
@@ -12,8 +12,8 @@ uniform float Amount;
 // Controls the contrast/variance of noise.
 #define VARIANCE 0.5
 
-vec3 channel_mix(vec3 a, vec3 b, vec3 w) {
-    return vec3(mix(a.r, b.r, w.r), mix(a.g, b.g, w.g), mix(a.b, b.b, w.b));
+vec4 channel_mix(vec4 a, vec4 b, vec4 w) {
+    return vec4(mix(a.r, b.r, w.r), mix(a.g, b.g, w.g), mix(a.b, b.b, w.b), mix(a.a, b.a, w.a));
 }
 
 float hash11(float p)
@@ -29,38 +29,33 @@ float hash12(vec2 p)
     p3 += dot(p3, p3.yzx + 33.33);
     return fract((p3.x + p3.y) * p3.z);
 }
-float hash13(vec3 p3)
-{
-    p3  = fract(p3 * .1031);
-    p3 += dot(p3, p3.zyx + 31.32);
-    return fract((p3.x + p3.y) * p3.z);
-}
 
 float gaussian(float z, float u, float o) {
     return (1.0 / (o * sqrt(2.0 * 3.1415))) * exp(-(((z - u) * (z - u)) / (2.0 * (o * o))));
 }
 
-vec3 madd(vec3 a, vec3 b, float w) {
+vec4 madd(vec4 a, vec4 b, float w) {
     return a + a * b * w;
 }
 
-vec3 screen(vec3 a, vec3 b, float w) {
-    return mix(a, vec3(1.0) - (vec3(1.0) - a) * (vec3(1.0) - b), w);
+vec4 screen(vec4 a, vec4 b, float w) {
+    return mix(a, vec4(1.0) - (vec4(1.0) - a) * (vec4(1.0) - b), w);
 }
 
-vec3 overlay(vec3 a, vec3 b, float w) {
+vec4 overlay(vec4 a, vec4 b, float w) {
     return mix(a, channel_mix(
         2.0 * a * b,
-        vec3(1.0) - 2.0 * (vec3(1.0) - a) * (vec3(1.0) - b),
-        step(vec3(0.5), a)
+        vec4(1.0) - 2.0 * (vec4(1.0) - a) * (vec4(1.0) - b),
+        step(vec4(0.5), a)
     ), w);
 }
 
-vec3 soft_light(vec3 a, vec3 b, float w) {
-    return mix(a, pow(a, pow(vec3(2.0), 2.0 * (vec3(0.5) - b))), w);
+vec4 soft_light(vec4 a, vec4 b, float w) {
+    return mix(a, pow(a, pow(vec4(2.0), 2.0 * (vec4(0.5) - b))), w);
 }
 
-void mainImage(out vec4 color, vec2 coord) {
+void mainImage(out vec4 color, in vec2 coord)
+{
     vec2 uv = coord / iResolution.xy;
     color = texture(iChannel0, uv);
     #if SRGB
@@ -73,19 +68,19 @@ void mainImage(out vec4 color, vec2 coord) {
 
     noise = gaussian(noise, float(MEAN), float(VARIANCE) * float(VARIANCE));
 
-    float w = mix(0.05, 0.5, Amount );
-    vec3 grain = vec3(noise) * (1.0 - color.rgb);
+    float w = mix(0.05, 0.8, Amount );
+    vec4 grain = vec4(noise) * (1.0 - color);
 
     #if BLEND_MODE == 0
-    color.rgb += grain * w;
+    color += grain * w;
     #elif BLEND_MODE == 1
-    color.rgb = screen(color.rgb, grain, w);
+    color = screen(color, grain, w);
     #elif BLEND_MODE == 2
-    color.rgb = overlay(color.rgb, grain, w);
+    color = overlay(color, grain, w);
     #elif BLEND_MODE == 3
-    color.rgb = soft_light(color.rgb, grain, w);
+    color = soft_light(color, grain, w);
     #elif BLEND_MODE == 4
-    color.rgb = max(color.rgb, grain * w);
+    color = max(color, grain * w);
     #endif
 
     #if SRGB