Re: Well, another question...Deleting polylines
About the two sided surfaces, I would strongly sugest that you instead of doing a two sided surfaces you just select the invisible surfaces and do a flip normals instead. That way all the surfaces faces the right way when you export it to another format (3ds obj lwo whatever) This is because you cant export two sided surfaces, so when imported into another 3d program for rendering or something, that surface will still be invisible. I know Poser acts in this way.
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