I noticed this problem in clothing object I've been working on. It appears where teo groups join at the edge of an object (end of mesh). By regrouping the edge of the object into a single group the problem goes away. I wonder if it has to do with the problem encountered when trying to weld three groups together? the same problem is seen in that case. Could Poser 6 ASSUME that there are three groups at that area the 2 groups actually in the object and a third "virtual" group, the end of the mesh? The work around I've figured is to make the edge an object a single continuous group. mike