I’m encountering an issue currently with nanite for skeletal meshes and animation optimizations.
When I’m enabling nanite for a skeletal mesh, LoD stops getting calculated, Get predictedLoDLevel returns always 0, it makes sense for geometry since it doesnt need it anymore but for animation and CPU optimization its a pain since then we loose the feature to disable heavy load nodes in the animgraph based on LoDs or remove bones like facial bones or dangling physics bones.
I’ve dug through the code and I believe it all comes down to FSkinnedSceneProxy and the property NumLODs there are plentyu of checks in this struct that checks for NumLODs > 1 but haven’t seen anywhere where this variable is set and its initialised to 1 so MeshObject->UpdateMinDesiredLODLevel(View, GetBounds()); in FSkinnedSceneProxy::GetViewRelevance is never called.
Is this a bug, intended or am I missing some undocumented obscure flag somewhere?