I'll have to give a test out when i get home but I believe if the highpoly imports with vertex colors, you could plug a vertex color map into the diffuse of it's material and bake that out. Or use xNormal, like Warren said.
Hi Guys I recently sculpted a high poly head and used polypaint to texture it in ZBrush and then retopologised it in max and unwrapped it. So I currently have a high poly sculpt that contains a polypainted texture but with no UV co-ordinates and a low poly model which has UV co-ordinates but no texture map. I was just…
Thanks for the advice guys, I ended up using xNormal to bake the vertex colours. Heres a progress thread of my workflow. http://www.polycount.com/forum/showthread.php?p=1558620#post1558620