UE5 MasterChief 3D model

Does this use the UE Mannequin skeleton, Metahuman skeleton, or something else?

Right-click on the skeleton mesh and then assign its skeleton to "SK_Mannequin" or "metahuman_base_skel".

Whenever I make adjustments to the material model (eg. enabling imperfections, dirt, etc.) the model turns white, is there a fix to this?

I have never used this asset before, but if you're in Unreal, I have found that when this happens, it can be related to the position, normal, and tangent precision in the model's details. I've set mine to: Position precision: 1/8cm Normal precision: 12 bits Tangent precision: 12 bits And it fixed this issue with some trees I had. Maybe it'll help you!

I've fixed this problem and uploaded the new files. You can just update it.