Performance

Dialog problems

streaming pool size:

r.streaming.poolsize=200000

Collision troubleshooot:

Enable Collision (LOD0)=True
CustomizedCollision=True 
ComplexCollisionMesh=(Mesh to use as collision)
CollisionPreset=BlockAll
DoubleSideGeometry=True
CollisionComplexity=Use compelx collision as simple

LODs

Cut by Box simpllified mesh from original. Ceate LODs from object, (nameObject)_LOD(n).

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https://support.capturingreality.com/hc/en-us/articles/4405753636754-Cut-by-box-tool https://docs.unrealengine.com/5.0/en-US/importing-static-mesh-lods-using-fbx-in-unreal-engine/ https://docs.unrealengine.com/4.26/en-US/ProductionPipelines/ScriptingAndAutomation/HowTos/CreatingLODs/ https://docs.unrealengine.com/4.26/en-US/ProductionPipelines/ScriptingAndAutomation/HowTos/CreatingLODs/