Taking vilters advice, I am going through removing nodes and running renders to help isolate materials.

I noticed that I get more holes when I render with 64 bit compared to 32 bit. Also, the holes appear when I render the image at a large. My test render are around 600 px range where my full render size is over 2000px.

bagginsbill, my intent for the shader configuration is to provide a soft glow on the edge of the material that interacts with the light. It glows more when more light falls on it. So far it worked fine in Poser 6, 7, 8, and 2010 without IDL. It would not suprise me that I came up with something overly complex and it is coming back to bite me.

Thanks for info on the Velvet and translucence. I will all know how the tests come out.

hborre, the scene is two infinite lights with the city background and a sky dome with a could texture. One light is a key light that gives shadows and the other is a fill light.

Thanks again for all the help.