More info than you needed or wanted.... This shows the P6 confusion I'm talking about. I made a shape sort of similar to yours; on the left in each picture is the version with separate groups for each donut. On the right in each is a welded mesh. You can see the confusion most clearly in the P6 preview. Poser doesn't know what's in or out. When P6 tried to render, it did the flat-black thing, indicating that it had no idea how to texture this critter. I reversed the whole thing, and it was OK. P4 didn't have any trouble at all, though. (This was actually loaded in P4, not the 'P4 renderer' within P6.)

My python page
My ShareCG freebies