posted 08-07- 07:25 AM
I don't import and export obj files, so I am not sure... I use the LOD file type and use Hippie's builder/extractor. Although now that I'm using 3dsmax I am starting all over again 
I have had perfect luck by making sure the normals are correct and the verts are shared in AC3D. Then appply smooth shading. Now export the object as a lod file.
I have had shading get messed up though, showing odd shadow lines - this seems to be related to the mesh shape - I hear that smooth shading is based on vertex normals that can get wacked in AC3D if you make extreme or bad mesh shapes. My first SE5a had major problems, then I went to new modeing techniques, now I only have trouble where seperate LODS meet in the game... I still have no idea how to fix this... I hope that my transition to max helps with this 
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-Sv =FC=
WWI in SDOE!