Random per island help please

[sarmath]

Hi

I am trying to use random per island in Blender 2.83 and luxcore 2.4 and it seems to not work for me.
This is test scene, can someone confirm what I am doing wrong or is it somehow broken thanks.

randomperisland.blend

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[B.Y.O.B.]

The random per island shape code performs a "merge doubles" operation before detecting the islands: https://github.com/LuxCoreRender/LuxCor ... pe.cpp#L43
This should probably be removed for this shape (Cycles doesn't do this).

[sarmath]

I have merged the doubles but still no effect like in sharlybg tutorial:
https://www.youtube.com/watch?v=NO9VE2SxXm0

Still cant figure it out ...maybe sharlybg can check it??