Hi ,
This was also submitted as bug #109269

Seems like I get random material assignations using unreal_material prim attribute on lower LODs , has anybody encountered this.
To replicate it, please try

1) Create bgeo with several LODs (prim Groups named as lod0 lod1 etc
2) Assign unreal_material in the bgeo as prim string attributes
3) Create related shader in Unreal engine
4) Load in the mesh with import Bgeo
5) Observe assigned materials in different LODs

thnx

Any updates on this ? Triaged, confirmed, being looked at? its a show blocker for me at the moment.