Here is a GLSL composite TOP that takes up to 8 inputs and composites them into one image. Each layer can be blended in any of 18 blend modes and can be translated and scaled individually. I've built this really quickly so there is no U, all the controls are on the GLSL top.
Actually I'm hoping someone out there would be into testing out a bit to see if there are any problems, there are lot of combinations of blend modes.
cheers
Keith
