export a usd file from maya with maya_usd plugin can't render correctly in ktoa

[awu2500]

I create a sphere in maya, and assign a aiStandarSurface,and connect a texture with aiImage.I export this sphere with maya 2022 usd plugin to katana,the texture can't render right,it became some solid color,and I got no error or warning in katana. I try this usd in Houdini Solaris, got the same result, then I export this sphere with arnold usd, the texture works fine in Solaris, but material is just gone in katana .My mtoa version is 4.2.1, ktoa is 3.2.2, htoa is 5.5.0.0

[Stephen.Blair]

maya usd isn't part of Arnold, so you may not get an answer here

[awu2500]

thanks for your reply,it is a maya usd issue, I replace 'primvars:map1' with 'primvars:st' in usda file, the texture finally work, I just don't why

[Stephen.Blair]

Yes, I tracked this down later, after I replied. Maya USD and Arnold USD use different names for the uv coords. That's something that needs to be fixed.

[awu2500]

got answer at autodesk community, just set an environment variable "MAYAUSD_EXPORT_MAP1_AS_PRIMARY_UV_SET ",uv will rename to "st" when export

[JWRodegher]

I had this issue and it was UV related. My solution was to update mtoa and the maya usd plugin (v 0.10 https://github.com/Autodesk/maya-usd/releases/tag/v0.10.0 )

Another solution is to just rename the "map1" to "st" I think, but I´d try to update the plugins first.