Sorry ,we can only help if you show the shader setup for the paint and the render settings.

I always render with IDL and GC set to ON, inside BB's sphere and with a single Infinite light.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!