   CG: Post Effects, where?
  I am writing my shaders in FX Composer, some effects like glow for instance cannot be applied during fragment shader since a glow would also affect pixel that would normaly not be part of the drawn area.Where can this effect be usually achieved? Is it possible to apply post effects in authoring enviroments like FX composer? Since this is a framebuffer operation it would be certainly faster when performed on the gpu.   
  Normally, you would render your scene to a render target, and then perform a pass with a full-screen quad covering the whole screen. This pass takes the render target as an input, and renders it out after processing. It's possible in fx composer, check the deferred rendering demo.   ;Quote:Original post by harveypekarNormally, you would render your scene to a render target, and then perform a pass with a full-screen quad covering the whole screen. This pass takes the render target as an input, and renders it out after processing. It's possible in fx composer, check the deferred rendering demo.This may be a bit advanced for now, but I hear rumors on the Internets that fullscreen *triangles* are actually the way to go. I.e. a big triangle that extends past the bounds of the viewport.   