Geometry nodes shading bug

Hello, i am having a frustrating issue with the shading in my render, i made a geometry nodes cube wave but I keep having artifacts when I switch to rendered mode

here is the blend file
Shading bug1.blend (1.6 MB)

That’s just regular z-fighting because you have lots of geometry on top of geometry… since your grid has 8 vertices occupying 0 width.

Don’t use a grid, use a line or points to instance on instead…

Good luck.

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