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[Closed] Smooth groups from normals?

Hi
I creating import script for game files, that contains vertex normls but no smoothing groups.
Do anybody knows how to calculate SG from normals?

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(@denist)
Joined: 11 months ago

Posts: 0

you can’t calculate SG using Vertex Normals. Vertex Normals calculation usually takes into account face SG.

Unless (I suppose) the vertex normal data contain duplicate normals for vertices that are part of a hard edge? Which I guess they must, if there has ever been any SG on them? Even so it sounds like a less-than-trivial problem to solve.