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Unreal Engine C++ API Reference > Runtime > Engine > Rendering > FSkelMeshSection
Syntax
int32 ChunkedParentSectionIndex
Remarks
If this section was produce because of BONE chunking, the parent section index will be valid. If the section is not the result of skin vertex chunking, this value will be INDEX_NONE. Use this value to know if the section was BONE chunked: if(ChunkedParentSectionIndex != INDEX_NONE) will be true if the section is BONE chunked