You know somebody should do a tut on gbuffers. It comes up alot and I don't think some people utilize them well in post processing.The manual doesn't really explain alot about them. For instance I created a gbuffer. In gimp and photo elements it looked kinda normal. In fireworks it looked different...almost transparent. Didn't try corel pp. It doesn't appear to output layers and just one image. Are you supposed to select one option per render and save that individually then composite it in layers.Just the whole process and usage would be good information.(Several programs output multiple layers w/ different info on it in one file...which is easier)

No need to think outside the box....
    Just make it invisible.