this thread is looking promising! for baking polypainting you should use AUVTiles (Adaptive UV Tiles) under the UVmap submenu of the Tools Palette. Set UV Map Border to 0 and then chose a texture size considering that 1pixel of texture space will correspond to a polygon, ex 1024x1024 is enough for roughly 1mil polygons.…
Thanks FNI, I tried a traditional unwrap, which obviously failed as the dynamesh in zbrush is 2 million polygons (too dense to calculate). I had also tried -- before posting -- a GUVTile map, which is what I normally use for dense meshes. Strangely, this also crashed zbrush. I tried your suggestion of AUVTile. I am not…