diff --git a/common/gal/opengl/antialiasing.cpp b/common/gal/opengl/antialiasing.cpp
index 049ac70b86..f0b3821a5c 100644
--- a/common/gal/opengl/antialiasing.cpp
+++ b/common/gal/opengl/antialiasing.cpp
@@ -185,7 +185,11 @@ void ANTIALIASING_SUPERSAMPLING::Present()
     glBindTexture( GL_TEXTURE_2D, compositor->GetBufferTexture( ssaaMainBuffer ) );
     compositor->SetBuffer( OPENGL_COMPOSITOR::DIRECT_RENDERING );
 
+    glColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE );
+
     draw_fullscreen_primitive();
+
+    glColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE );
 }
 
 
@@ -547,7 +551,11 @@ void ANTIALIASING_SMAA::Present()
     glActiveTexture( GL_TEXTURE1 );
     glBindTexture( GL_TEXTURE_2D, blendTex );
 
+    glColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE );
+
     pass_3_shader->Use();
     draw_fullscreen_triangle();
     pass_3_shader->Deactivate();
+
+    glColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE );
 }
diff --git a/common/gal/opengl/opengl_compositor.cpp b/common/gal/opengl/opengl_compositor.cpp
index ef6663e532..3db5168ccc 100644
--- a/common/gal/opengl/opengl_compositor.cpp
+++ b/common/gal/opengl/opengl_compositor.cpp
@@ -297,7 +297,7 @@ void OPENGL_COMPOSITOR::ClearBuffer( const COLOR4D& aColor )
 {
     wxASSERT( m_initialized );
 
-    glClearColor( aColor.r, aColor.g, aColor.b, 0.0f );
+    glClearColor( aColor.r, aColor.g, aColor.b, m_curFbo == DIRECT_RENDERING ? 1.0f : 0.0f );
     glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );
 }