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How do I get a UV Map symmetrical?


UncleOx
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Hi There

 

I'm absolutely loving 3D Coat's UV unwrapping. Just a quick question: I want to unwrap a character so that the UV map itself on EG. the head, ends up being symmetrycal. The character is symmetrical but even with symmetry switched on, the center edge on the UV map ends up being skewed instead of being a straight line as expected on a symmetrical map. As a result the the polygons on the map aren't symmetrical either. Marking seams does work symmetrically but the map itself is not. Is there a way in which I can get the map symmetrical? I need the UV's not to overlap so a game character type map won't work.

 

Thanks in advance

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It might help to use the "More Reply Options" and upload a view of your UV map as the 'blue' and 'red' may supply some clues.

Thank you for the reply. I've unwrapped a second head to make sure that it wasn't an issue unique to the first head. On the second head, the center line was also skewed so I took a screen grab of that one while I was busy. In the attached image, I've indicated the skewed center line in red. There are some overlapping UVs on this map but the other one had no overlapping UVs so I don't think that is a factor. The model is 100% symmetrical and you'll notice my seams are symmetrical as well.

 

Thanks in advance

post-39267-0-17542700-1436921018_thumb.j

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Most of your 'Islands' have seams all the way around but the head and the one above it doesn't. Try adding these seams before you unwrap.

Thanks for the suggestion. The head is a loose object so the seam you are refering to, is an open edge. I tried marking it in any case but it didn't effect the UV map at all. However, I was playing around with it a bit and I discovered that the problem becomes much less pronounced if I split the back of the head completely from the front. A seam that doesn't create an island but runs down the center edge makes the problem worse.

 

In BodyPaint 3D there's an option to pin vertices so that a "Relax" action doesn't effect them. What I usually do in BodyPaint, is to select the center vertices and scale them to 0% perpendicular to the direction of the center edge. I would then pin them down and relax the UV. In that way my map would be 100% symmetrical. Does 3D Coat have similar functions to this? I read somewhere on this forum (can't find the post again right now) that you can scale vertices as I discribed above but, apart from the manipulator gizmo, I can't find a scale option in the UV room.

 

Thanks for the patience and the help.

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Select your center vertices and use the Vertical tool to line them up strait. Invert the selection and use the Relax tool.

Thank you for your willingness & patience to help me with this. I tried your suggestion but it doesn't look like this is going to solve my problem. However, your suggestion helps me out with another way of getting the map symmetrical. It involves a little extra manual work but not remotely as much as I had to do before.

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