I've set up a render with no lights, 2 prop balls scaled to 800%, 1 front and slightly higher than face, the other to the right and slightly higher as light emitters with ambient set to white and with an ambient value of 5. I'm using snarlygribly's ezskin (which is wonderful by the way) with the proceedural bump and specular nodes stripped out and replaced with my bump and specular maps.

Im rendering with SSS and IDL Poser 2012pro. I get these darkened areas shown by the arrows. The areas where this occurs have black artifacts appear during the SSS pass. Anyone know what might be causing this?