I have exported a Megascans asset out of Unreal as .usda and imported it into Solaris. The default generated material (USD Preview Material) has the texture looking correct. However when rebuilding the material network in a USD MaterialX Builder, the textures seem to occupy a different space, or be distorted somehow. Has anybody come across this before?
In the first 2 images you can see the USD Preview Material network and the correct intended render. In the second set of images you can see the MtlX Material and the associated incorrect render. Both are using the st primvar.
USD Preview Material Correct Render:
MaterialX Incorrect Render:
Edited by Hamilton Meathouse - Nov. 3, 2026 19:54:23
For somewhat of a ground truth test, I plugged the same grid texture ($HFS/houdini/materialx_resources/Images/grid.png) into both materials and they gave an identical result, so i think that rules out interpretation of UVs?
I started cleaning up the scene and and changing full texture paths to relative paths and it started working. Hmm, will keep investigating and see if I can repro and upload here.
