USD procedural does not respect the texture search path

[peterhorvath111]

Loading a usd file, which has an image shader with a relative path gives an error when the texture search path is properly set.

Repro:

• Download and unzip usd_texture_searchpath_error.zip
• kick scene_usdproc.ass

Seems like usd ignores the Arnold texture search path and looking for the texture in the current working directory.

00:00:00   244MB         | starting 12 bucket workers of size 64x64 ...
00:00:00   257MB ERROR   |  [texturesys] /mtl/mat/standard_surface/uvgrid: Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
Invalid image file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg": Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
00:00:00   258MB ERROR   |  [texturesys] /mtl/mat/standard_surface/uvgrid: Invalid image file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg": Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
00:00:00   260MB WARNING |  [kick] render aborted due to earlier errors
00:00:00   260MB ERROR   |  [texturesys] /mtl/mat/standard_surface/uvgrid: Invalid image file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg": Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
00:00:00   261MB ERROR   |  [texturesys] /mtl/mat/standard_surface/uvgrid: Invalid image file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg": Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
00:00:00   261MB ERROR   |  [texturesys] /mtl/mat/standard_surface/uvgrid: Invalid image file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg": Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
Could not open file "c:/tmp/usd_texture_searchpath_error/uvgrid.jpg"
00:00:00   270MB         |  [skydome_light] /Arnold_Sky: 1000x1000 importance map done in 0:00.07, average energy 0.212518
00:00:00   270MB WARNING |  render terminating early:  unknown reason

The same scene is working fine with an ASS procedural (see scene_assproc.ass).

Also tested in Arnold 7.1 where the USD procedural is working fine, so this is a regression in the latest build.

[autodesk-oss-arnold-bot]

Issue synced internally to ARNOLD-13635