"Import High-Res mesh" feature for Nanite is crippled due to old FBX material ID bug.

After having further looked into it I can almost confirm there is no way to fix this until Epic does something.

The good new is: https://github.com/EpicGames/UnrealEngine/commit/e43b81ce13a77f7df0d36afb3dac5687e99e0134

The bad news is it’s likely not until 5.3…