Weird artifacts when rendering on Nvidia GPU

Question

For some reason, when rendering on my RTX 2060 in Blender, I'm getting these weird flickering artifacts.

As can be seen from the above screenshot, my node setup is a cube compressed into a plane by some simply vector maths with a musgrave texture applied to it. These artifacts are only appearing when rendering with the GPU (this includes the final render), and on CPU the scene renders just fine.

How can I fix this? Is something from with my card, or is this some Blender bug?

Allen Simpson · Accepted Answer · 2021-05-04T23:24:49.110

2

Since you are reducing the z axis to 0 the top and bottom faces are z-fighting with each other.

I get the exact same thing on my end, by the way, and I'm also perplexed as to why the CPU doesn't face this issue.

I tried to work out a solution using Backfacing, but failed.

Instead of leaving the z disconnected you can divide it by some large number and get a workaround.

edited May 04 '21 at 23:24

answered May 04 '21 at 15:32

Allen Simpson

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That makes sense, but why does this only occur on the GPU? – Arihan Sharma May 04 '21 at 15:33
I'm curious about it as well, but I can't find anything right now. – Allen Simpson May 04 '21 at 17:16
@ArihanSharma I've updated with a workaround – Allen Simpson May 04 '21 at 23:26

Weird artifacts when rendering on Nvidia GPU

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