Ooops, Ooops, Ooops,... You are right, I was wrong. I hereby deny my black/white notes and start to claim the opposite... :-) I don't know why I confused it, but I was pretty sure when I wrote it, and my own testing files for SpeedBump cleary show that "black" indeed is a "hole". I guess I mixed it up since the "olive" binary conversion looks just like the opposite of the actual effect. So, it now is 100%, 24 carat: 1) BLACK = HOLE 2) WHITE = MOUNTAIN Apologies for any frustration... :-) And it definitely is the green channel which gets inverted, and the result is that shadows are only correct at 0 and 180 degrees, and worse at 90 and 270 degrees. I can't say anything about ProPack, except that the shadows seem to work on Mac. However, I never bothered to install the PC version of PPP, so I can't test it. I only have PPP for testing purposes and refuse to work with it, due to the outstanding number of bugs which make it virtually unusable on Mac.