Ahh, i though that it initializes the values then just looped round the void so it would only touch all those texture offsets and addition once per frame. Will change it, ta.
For the Perforations scene change the size: for the camera and for the quad into which the perforations shader renders its output. You will probably want to change the positions of the various items as well.
gl_FragColor.a = length(gl_FragColor.rgb);in fragment shaders (above pic). Its sweet for including backgrounds for some scenes
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