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DCWarner
07-20-2007, 01:44 PM
I 'm finally getting my hands dirty with a large uv layout, and I have a simple problem. I have bolts that have angled sides. So of course I do a cylindrical mapping, but I get odd distortions. I also attemtped to lay the bolt flat and It gets worse. Not sure how to lay it out properly

I'll post a pic. It just seems like a very very basic issue, and I am missing it completely.


thanks,
DC


http://i96.photobucket.com/albums/l165/Cannoth/doh.jpg
MarkD
07-20-2007, 04:28 PM
Your goal is to mimic the shape of each side poly. You want the shape of each side poly to be like #3. If you square it off and have the sides straight it will distort. Keep in mind that you can only minimize distortion but never fully get rid of it. You'll drive yourself mad trying to stamp out every last bit of it.

Three ways that I can think of off the top of my head.
http://www.vigville.com/forum_images/UVChoices.jpg

- 1) Relax the shape so its more of a semi-circle. Edges touching is nice if you wish to draw across the entire shape, however you have to draw a wierdly distored circle =/

- 2) Planar map each side piece and line them up in a row. This will give you a nice crisp line with none of the ill effects of anti-alaising. however each edge will not meet so painting on each piece could give you seams.

- 3) Planar map each piece and have them overlap/share the same UV space. Almost the same as above but if each piece is to be the same and the edges tile, why not save yourself some space. Provided each peice doesn't need to have its own unique UV space for some reason (like normal maps in certain cases).
BertMac
08-12-2007, 12:53 PM
hmmm i'm haveing some misunderstandings to i guess,
Would you not get to many repeating textures on that bolt. if ya do it your way MarkD
leigh
08-12-2007, 09:21 PM
MarkD is correct. You're getting that distortion because the cylindrical unwrap doesn't consider the tapered shape of the object. The polygons in the UV map should retain the shape and proportions of the polyons in the model as closely as possible for minimal distortion.
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08-12-2007, 09:21 PM
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