As Stewer suggests, increasing bias and decreasing range in AO helps with problems like that. Sometimes you have to play with the AO settings to get what you want. :-) "I haven't had much luck using skin shaders in P6." There was a thread about this. Apparently the skin shader in P6 was changed, and if you import older scenes that were shaded in P5 with that shader, it will render wrong. Was the skin shader you're using applied in P5 originally?

---

Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.