I've made a Raster Screen Simulator for Autodesk Softimage and in Open Shading Language OSL.
It convert image in pixelised version, with control over color depth (from 8 colors to 16M), with visibility of gap and RGB pattern.
You can freely download it on my blog : vadrouillegraphique.blogspot.fr/2012/11/image-2-screen-shader.html
It is available as Softimage Shader Compound and as OSL script.
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