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Trouble applying Iray shader to OBJ

mikethe3dguymikethe3dguy Posts: 515
in Technical Help (nuts n bolts)

Using a 3rd party OBJ of a crumpled rag, I tried to apply an Iray lace fabric shader, but all I get is a solid, shiny surface instead of a lace pattern. I've never had this issue before. I did try varying the horizontal & vertical tiling by quite a bit, but get the same results every time. The image provided shows a standard primitive plane on the left and the OBJ on the right Top is NVIDIA viewport and bottom is wireframe view.

 

Lace.png
1309 x 1474 - 1M

Comments

  • GordigGordig Posts: 9,893

    Does the OBJ have the Uber base shader applied? If not, you'll need to apply that before the preset.

  • mikethe3dguymikethe3dguy Posts: 515

    Yes it does

  • MelanieLMelanieL Posts: 7,317

    Is the OBJ UV-Mapped?

  • zombietaggerungzombietaggerung Posts: 3,705

    The crumpled rag probably isn't UV unwrapped. Which means it cannot properly display any image map, so it will only show a solid color.

  • mikethe3dguymikethe3dguy Posts: 515

    zombietaggerung said:

    The crumpled rag probably isn't UV unwrapped. Which means it cannot properly display any image map, so it will only show a solid color.

    A-ha. Thanks - any way to fix this?

  • mikethe3dguymikethe3dguy Posts: 515

    I downloaded UVmapper and created a UV for it. Just trying to figure out how to apply it to the object...

  • zombietaggerungzombietaggerung Posts: 3,705

    mikethe3dguy said:

    zombietaggerung said:

    The crumpled rag probably isn't UV unwrapped. Which means it cannot properly display any image map, so it will only show a solid color.

    A-ha. Thanks - any way to fix this?

    Well, I would import the obj into Blender and UV unwrap it there then re export the unwrapped obj out and into DS. Since it's a funny shape, I'd use the Smart UV Project option in Blender.

  • zombietaggerungzombietaggerung Posts: 3,705

    mikethe3dguy said:

    I downloaded UVmapper and created a UV for it. Just trying to figure out how to apply it to the object...

    You don't have to "apply" it. Just re-export the now UV unwrapped object out of that program and import it into DS. then apply the shader as before.

  • mikethe3dguymikethe3dguy Posts: 515

    zombietaggerung said:

    You don't have to "apply" it. Just re-export the now UV unwrapped object out of that program and import it into DS. then apply the shader as before.

    Ah, beautiful, worked like a charm - thanks!

  • zombietaggerungzombietaggerung Posts: 3,705

    Glad to help. yes

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