> Ok. color2gray conversion is already changed and unified for several places of
> source code. it is even more than marked in sources of MegaPOV 1.0 with
> CONNECT_GRAY_EVALUATION_PATCH.

Fine. I just checked, and the image_pattern bug is indeed already fixed in
MacMegaPOV 1.0 (in the same way I suggested). The calculations in
bump_map(...) are still the old (wrong) ones in the MacMegaPOV 1.0 source,
so I guess this is one of the places you are referring to by "even more". 

 -Christian

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