BuildTreeAnyThread ( TArray< FMatrix >& InstanceTransfo..., TArray< float >& InstanceCustomDat..., int32 NumCustomDataFloats, const FBox& MeshBox, TArray< FClusterNode >& OutCluster..., TArray< int32 >& OutSortedInstance..., TArray< int32 >& OutInstanceReorde..., int32& OutOcclusionLayerNum, int32 MaxInstancesPerLeaf, bool InGenerateInstanceScalingRange )