Hi If you are using other 3D application to render your animation you can create new material maps. I don't know C4D very well, but in Lightwave I'd open the exported obj file. Then I'd select the offending body part and create new material which I then set to transparent. In Lightwave it is very easy to do, a matter of selecting polygons almost like the grouping tool in Poser. Also, MadYuri is correct, Poser will not export body parts which has its visibility turned off via the hierarchy setting window.