I have a question about the intricacies of C's .obj import/export.

I'm modeling a vehicle body in the vertex modeler. You can see the shape is very planar & angular. The model shot shows the blue edges as creased (sharp) and the gray links as smooth. The render looks good. I export as a .obj to make a UV texture map, then import the .obj. I suspect the .obj format ignores a creased edge and turns everything smooth (all the gray links in the model shot). You'll notice the render makes it look like gummi-truck. Of course, I can't explode it in the vertex modeler to crease the sharp edges - this negates the UV mapping! Is there a trick? A setting? Is the .obj / UV map only good for smoothed organic shapes?

I have to add, I've enjoyed using the vertex modeler after doing Litst's vertex Head tutorial. First-rate! Thanks!