inverted normalmap with inverse UVs

[oglu]

We get inverted normalmaps with inverse UVs.
CPU and GPU does handle this differnt. Could we get this unified.

[hermit.crab]

Hm, It seems only CPU in 3ds Max (Standalone CPU result is similar to GPU) displays regular normals when UVs are flipped. I'll ask the devs which behavior has to be expected.

[oglu]

Thanks!
The same is in Maya.

[hermit.crab]

Hm, it seems to happen only when there's a VRayUVWRandomizer as the mapping source for the Normal map. Is that the case on your end? If not, could you attach a simple scene?

[oglu]

No just a simple file node to load the normalmap.
Render in CPU and GPU does look different.

[hermit.crab]

Thank you. I've logged all the info (internal bug-tracker id: VMAX-12750) for developer investigation.

[hermit.crab]

Actually, in Maya CPU, there's a checkbox (Render Settings> Overrides> Textures> Uninverted normal bump) to control whether the normals get inverted or not when UVs are flipped. In GPU this option is always active.

[oglu]

Thanks good to know.