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Thread: Overlapping UV polygons, what do you do?

  1. #1
    Super Member Paul_Boland's Avatar
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    Question Overlapping UV polygons, what do you do?

    Hi Folks.

    I've created a UV Atlas map of a spherical object and I've ended up with some polygons on the flat UV map overlapping other polygons. Obviously this isn't going to work for taking it into Photoshop to paint on textures so what can I do? Is there a button/option somewhere I need to press to prevent this from happening? Or can I just grab the overlapping polygons on the UV map and move them elsewhere on the UV map and still have the UV map work when I apply the UV texture to it? Lots of UV's there!! LOL!! Thanks.
    KnightTrek Productions
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  2. #2
    Curmudgeon in Training Ma3rk's Avatar
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    Essentially yes on moving the UV geom around; no Magic Button in Lightwave though. If you find your getting into a lot of UV work, you'll want to check out RizomUV. It has a number of magic buttons.

    I've set up keypad 4 to do a double split vertical window with the UV on one side & perspective on the other. That way you can select, hide, etc. with the poly side, but then manipulate the UV side to correct things.
    "Never be a cat in a cartoon. Never." Chief Wiggum

  3. #3
    Super Member Paul_Boland's Avatar
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    Thanks very much. New to UV mapping and I have a good grasp of it, but still learning and seeing overlapping polygons was weird! LOL!!
    KnightTrek Productions
    http://www.knighttrek.com

  4. #4
    Set the Relative Gap Size larger. I think the default is 20%.
    Tim Parsons
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    http://www.sauder.com

  5. #5
    Super Member Paul_Boland's Avatar
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    Thanks, Tim. I set it to 25%. Making progress.
    KnightTrek Productions
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  6. #6
    The plg tools are great to have and make use of.
    https://www.lightwave3d.com/assets/p...try/plg-tools/
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  7. #7
    Yeah between the PLG tools and the new UV advancements in 2019, the UVing process in LW is quite usable and hassle free for a lot of work.
    Tim Parsons
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    Sauder Woodworking Co.

    http://www.sauder.com

  8. #8
    Electron wrangler jwiede's Avatar
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    Newtek really needs to at least provide in-box equivalents to the PLG tools. LW can't afford to be as reliant as it is on a set of aging, unmaintained/unsupported third-party UV tools.

    LW's native UV functionality generally needs some critical updates w.r.t. UV tools. Auto-layout isn't a silver bullet, and for those who can't use PLG tools, the native UV tools are too basic to effectively deal with modern high-poly UV fixing efforts needed when UV auto-layout results alone aren't adequate, let alone from-scratch UV layout of modern high-poly models. Bulk alignment and spacing tools for UVs are a particular weak spot, and increasingly critical to task.
    Last edited by jwiede; 09-17-2019 at 01:30 PM.
    John W.
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  9. #9
    Registered User DCjr's Avatar
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    I agree, Lightwave UV mapping needs an overhaul. I use Maya LT for UV mapping. They have a very nice UV tool kit. Check it out for a good example of decent UV tools.

  10. #10
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    Yeah, the UV tools need to be reworked. I was hopeful when they made some improvements with 2019, but it's still not up to the level of the UV tools in the other 3D apps. The documentation is pretty weak in this area also, so even if some of the capabilities are there, good luck figuring it out through hours of trial and error. UV work is an area where having a dedicated window with all the tools like Max or Maya is easier to work with. I'd like to see them look at those along with 3D Coat, and just copy the best bits of them, into a best of all worlds system. I could be mistaken, but I think it's mostly a matter of interface and documentation. Most of the capabilities exist under the hood, but it can be hard to use them properly, when they are scattered among numerous tools, some of which are only half implemented.

  11. #11
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    I should add for a sphere, you might do better than an atlas map, with one of the other unwrap styles, like spherical. You can get a totally flat grid if you chop off the poles, but of course you will have stretching, so it depends on your texture. You could do two hemispheres with an AFB unwrap.

  12. #12
    Quote Originally Posted by jwiede View Post
    Newtek really needs to at least provide in-box equivalents to the PLG tools. LW can't afford to be as reliant as it is on a set of aging, unmaintained/unsupported third-party UV tools.

    LW's native UV functionality generally needs some critical updates w.r.t. UV tools. Auto-layout isn't a silver bullet, and for those who can't use PLG tools, the native UV tools are too basic to effectively deal with modern high-poly UV fixing efforts needed when UV auto-layout results alone aren't adequate, let alone from-scratch UV layout of modern high-poly models. Bulk alignment and spacing tools for UVs are a particular weak spot, and increasingly critical to task.
    I agree - PLG tools need to be a part of LW out of the box.
    Tim Parsons
    Technical Designer
    Sauder Woodworking Co.

    http://www.sauder.com

  13. #13
    I'd hope they would shoot a lot higher than PLG.

  14. #14
    Quote Originally Posted by hrgiger View Post
    I'd hope they would shoot a lot higher than PLG.
    No question.
    Tim Parsons
    Technical Designer
    Sauder Woodworking Co.

    http://www.sauder.com

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