Good call on the tags Not sure why that's happened. I've applied the same transformations to the tags as I have to the meshes so they should be correct (or maybe the tags were in incorrect and carcass does some weird magic to fix them up again). I do plan to make a converter back to FBX. This seems easy enough, now that I've seen how the FBX format works Probably won't add this to ModView, at least not for now. The good thing about having a standalone utility for things like this is you can create a batch script or something similar to convert an entire directory of files to GLM. Haven't got to working on weighting just yet But another quick question! I'm having problems with texture coordinates as 3ds seems to export FBX with more texture coordinates than positions and normals. Are you perhaps preserving smooth groups when you export (if such an option exists)? Can you send me the model with and without smooth groups preserved if possible? Thanks