Thanks so much for the help, but nothing worked. The rock is one of the 25 real rocks Yes it is UVMapped This is a picture of some renders The top row is with the Poser 4 render and the rock NOT inverted. The bottom 2 are with FireFly and the Rock IS inverted. All I see that happened by inverting the rock is that it flipped. Not a problem in the picture, because I can always move it back. Just wanted you to see exactly what happened. It looks like the problem is in the shadow. Any idea of how I can fix it?