you shuldnt try projecting the polypaint through zbrush, give the high poly some guv tiles while its on its lowest subdiv, select texture from polypaint, export the polypaint and the highpoly, then in xnormal import the high poly and "base texture to bake" then select base texture in the baking options. And done :)
Theyre automated UV tiles that zbrush gives you're model, they should be under the UV toolbar if i recall correctly, you should only use them for the high poly model though. Be sure you flip the polypainted texture vertically as well
I'm trying to project my polypaint information from my high poly sculpt to my retopologised model and when i hit project all this happens Can anyone help me with this? would be great to get a quick reply if possible as i'd like to have it done tonight :) thanks Liam