Gen8 body gets black dots when in contact with another object/character

Currently (with IRay) my Gen8 character (Michael) gets black dots around a body part that is touching an object or another character. The longer the render, the more black dots show up around the area.
On closer inspection within GIMP/Photoshop, these dots are actually transparent when zoomed in. How can I fix this? I never this problem with Genesis 3 characters.
Comments
Update: Turning on "Draw Dome" fixes it, but I really need transparency for the background.