I'm new to using displacement mapping. I've created some objects then mapped them in UV Mapper, going through the procedure to split vertices and assign different material groups to adjacent surfaces to keep Firefly from rounding off the edges. Now everything works fine until I try to use a displacement map on the object. When I render, I end up with the different material groups separating at their edges so you can actually see inside of the object. Am I missing something here? Is there a fall-off setting or something that should be used with displacement to avoid having the edges displaced away from each other? Gromit