Rhino 7 vray 5 materials duplicates again

Hi, I just found out there’s also RenderPasteConflictOption command in addition to RenderImportConflictOption, that solves the issue for me.

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Hi, to me this happens when I undo sth. Even with the _RenderImportConflictOption command set to discard, it still happens. Hope that’s helpful, at least I know where they come from.

Maybe a Rhino update will help:

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Hi everyone,
Just to inform you that there was a bug in Rhino related to material duplication. The issue was related to materials assigned to objects in blocks. Both RenderPasteConflictOption and RenderImportConflictOption were useless tackling the problem.

McNeel fixed it in 7.24 and 8.0 WIP (AFAIK no fix for Rhino 6)
Please update to 7.24 or newer, and if the issue persists, report here

Thank you