Karma-XPU flipping normal map on one side of model ?

   2119   1   0
User Avatar
Member
5 posts
Joined: May 2020
Offline
Hi, just started looking at Karma XPU and I have an issue where it appears that on one side of a model the normalmap is in the wrong direction when I use XPU but not when using CPU. I'd post this as a bug but I'm fully prepared for it to be user error . The textures are from Substance exported as PBR rough with opengl normals. Small details in the normal map like screws are reversed on one side too. Shader is a mtlx_standard_surface. Normal map image is set to Vector which is piped through a mtlx_normal_map node.

Thx rOb
Edited by insanerob - Nov. 23, 2022 11:10:19

Attachments:
Substance.jpg (35.3 KB)
karma-cpu.jpg (29.8 KB)
karma-xpu.jpg (32.0 KB)

User Avatar
Member
2658 posts
Joined: June 2008
Offline
Hard to say without seeing your material setup. Are you using the mtlxTiledImage? It looks like a tiling or mirroring effect on that endcap.
Using Houdini Indie 20.5
Windows 11 64GB Ryzen 16 core.
nVidia 3060RTX 12BG RAM.
  • Quick Links