Setup your materials that use custom primitive data to be ready to work on HLODs, fixing HLODs just rendering out black.
My HLODs were looking sad in the distance, since I use custom prim data for color and they all lost their colors. It took me a long time and some long tangents but I found a solution that goes with what Unreal already has!
For the step-by-step tutorial part, I’ll be using foliage (bush) and static meshes (chair) from the starter content in a UE5.5 empty blueprint project.
https://dev.epicgames.com/community/learning/tutorials/nzaL/unreal-engine-epic-for-indies-fix-your-materials-on-hlods-that-use-custom-primitive-data-match-your-hlods-to-its-original-meshes