DOF artifacts, so that's what's going on been pulling my hair out trying to figure out what was going on. Though I'm sure I checked poser pro to see if it was a bug and it happened there too, I though I was doing something wrong. It seems those artifacts at least the ones I've been getting are transparent to an extent in a weird way. BB I guess your back ground colour is black. I tried with white and cyan and noticed it was selected background color. Even if there is multiple objects behind the back ground colour leaks out.