3Dsmax multi-material can NOT show the bitmap

The problem show in this video
https://youtu.be/uxZlVnA2k9s

Just so so so simple I want a pillar with two map

The BUG is after exported USD and MDL to OMN
multi-material can use 1 map only, not showing another map

if future project has many mapping in a poly, what can I do?

This is not supported. You have to do it via polygon edit UI, you can set each face with one material ID. It will also support several materials on a mesh.

Could you please check the video i post before, you can see i already use material ID on different face to assign 2 maps on my box with muti-texture, after export to OMN, it doesn’t work -.-

https://youtu.be/uxZlVnA2k9s

can you try using default bitmap and not vraybitmap and see if it yields the same result?