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multiply and negative displacement

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  • multiply and negative displacement

    looks like vray wont read negative values in a dispmap if i use a composite node to combine two maps...
    Attached Files
    https://linktr.ee/cg_oglu
    Ryzen 5950, Geforce 3060, 128GB ram

  • #2
    disp_test.rar here the maya file...
    Attached Files
    Last edited by oglu; 03-10-2017, 10:36 PM.
    https://linktr.ee/cg_oglu
    Ryzen 5950, Geforce 3060, 128GB ram

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    • #3
      Try setting explicit displacement bounds in the "Displacement control" extra attributes to the displacement node. When the texture is not directly passed from a file but goes through other nodes (incl. if it's a sequence or uses texture tile tags like UDIM/UVTILE) V-Ray is not able to automatically compute the bounds and it's necessary to set them explicitly especially when there's negative values. Try settings something like -5 to +5 and see if it helps. Btw, since Maya 2016 (I think) the HSV color picker does not allow negative values, so you'll need to switch to RGB 0-1 and set the negative minimum value for R, G and B.
      Alex Yolov
      Product Manager
      V-Ray for Maya, Chaos Player
      www.chaos.com

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      • #4
        thanks that does work...
        https://linktr.ee/cg_oglu
        Ryzen 5950, Geforce 3060, 128GB ram

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