USD+MaterialX GPU vs CPU rendering inconsistency

[RogerDass]

Hello,

I have a test scene:
https://github.com/RogerDass/Usd-Mtlx-Example

The Readme explains the issue as well with images, but the UV coordinates in the USD model file don't seem to render properly in the GPU version of Arnold. The CPU renders correctly (notice the brass ball second from the front).

GPU:

CPU:

 

 

[thiago.ize · Accepted solution]

Thanks for the repro. We created internal ticket ARNOLD-13432 for fixing this.

[RogerDass]

Thanks for tracking this! How might I track the progress - is there a way?

[RogerDass]

A little more information:

- the UV coordinates do seem to work for the wood grain material below the brass ball. That image is RGB while the roughness map that isn't UV scaling correctly is a float.

- the sub-surface scattering is behaving differently, or maybe not working between CPU and GPU modes.

[thiago.ize]

That's an internal ticketing system and there's no way for you to track the progress until it's in a released build. The public release notes will include the ticket number.