quad2dat program

[Travis Cobbs]

I haven't seen your image file, but I think starting with a 256-color image might be exacerbating the problem. The original full-color file already had to be down-sampled to get to 256 colors. Depending on the algorithm used to do that, and the source image file, this could introduce significant color shifts. Applying the full LDraw spectrum to that color-shifted file could make things worse.