Thanks. np. SOme people don't have this issue with firefly. Also not all obj files are fragmented. It can be a figure or a prop or an imported obj. Basically it is just about some people having a hang on the firefly calculation that reads the materials from the mesh on rendering. This particular issue has a very specific symptom being a long hang on the "adding objects" status bar. Using a script or utility for defragmenting the obj g/usemtl lines is really just another thing people should do during content creation, like adding a white backdrop to a texture, etc. It just gets added to the list of things to check for when building a product.

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"Conviction without truth is denial; Denial in the face of truth is concealment."

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