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Another rendering quirt: flawed pants.

DekeDeke Posts: 1,631
in New Users

I'm using a toons generation figure wearing jeans, but for some reason the jeans create a oddball geometric shape around the character's backside. Any idea why?

Comments

  • Richard HaseltineRichard Haseltine Posts: 100,842

    Please post an image.

  • DekeDeke Posts: 1,631

    Sorry. I don't know how to post an image.  It seems to be something about the geometry around the butt that is forcing a strange artifact, a jagged shape that varies with each frame of the animated shot. I've tried adjusting the pants size and fitting and scale but nothing seems to get rid of this quirk.

  • Sven DullahSven Dullah Posts: 7,621
    Deke said:

    Sorry. I don't know how to post an image.  It seems to be something about the geometry around the butt that is forcing a strange artifact, a jagged shape that varies with each frame of the animated shot. I've tried adjusting the pants size and fitting and scale but nothing seems to get rid of this quirk.

    Sounds like a smoothing modifyer issue? What happens if you turn it off?

  • Richard HaseltineRichard Haseltine Posts: 100,842
    Deke said:

    Sorry. I don't know how to post an image.  

    Click the Attach a fiel link under the box for your text, then click the Browse button and select the image. If you don't know how to take a screen shot, for Windows I suggest using the Snipping Tool (in Windows Accessories), click New, drag out a rectangle enclosing the area youw ant to capture, and fianlly click the disc icon to save.

     

  • DekeDeke Posts: 1,631

    How do you turn off smoothing modifier?

  • Sven DullahSven Dullah Posts: 7,621
    Deke said:

    How do you turn off smoothing modifier?

    Select the clothing in the scene tab, go to parameters/general/smoothing. There is a toggle on/off button for the smoothing.

  • DekeDeke Posts: 1,631

    Here's some pix. Thanks for the how-to.

    The artifact is a geometric volume that varies with each frame..here rendered in a basic open GL. When rendered in. Iray, there is also an artifact in the surface of the pants. I assumed it was related to some sort of poke-through and increased the size of the pants, but it didn't fix the problem.

    Pants Artifact 1.jpg
    720 x 405 - 39K
    Pants Artifact 2.jpg
    720 x 405 - 28K
    Pants Artifact 3.jpg
    1920 x 1080 - 472K
  • Sven DullahSven Dullah Posts: 7,621

    So does it go away if you turn off smoothing? You could also try changing the smoothing type from generic to base shape matching, that sometimes does the trick!

  • DekeDeke Posts: 1,631
    edited December 2018

    I'll try that. Stay tuned.

     

    Post edited by Deke on
  • DekeDeke Posts: 1,631

    Okay that adjusting or turning off mesh smoothing does get rid of the wierd artifact. It does result in some poke-through patches, and I'll keep tinkering on a fix for that.

  • Sven DullahSven Dullah Posts: 7,621
    Deke said:

    Okay that adjusting or turning off mesh smoothing does get rid of the wierd artifact. It does result in some poke-through patches, and I'll keep tinkering on a fix for that.

    Ok, let's hope those jeans come with some adjustment morphs, otherwise using a dFormer to expand the fabric at the problem area could work.

  • scorpioscorpio Posts: 8,415
    Deke said:

    Okay that adjusting or turning off mesh smoothing does get rid of the wierd artifact. It does result in some poke-through patches, and I'll keep tinkering on a fix for that.

    Rather than turning smoothing off try changing 'The Smoothing Type' under Mesh Smoothing to Generic from Base Shape Matching.

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