Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: lightwriter on 2025-06-03, 13:13:29

Title: Shading artifacts when using sheen
Post by: lightwriter on 2025-06-03, 13:13:29
Hi there!

I'm trying to use sheen in order to mimic velvet, but something strange is happening. The square artifacts appear regardless of the roughness of the sheen layer. The objects have correct normals and geometry.
When I disable reflections in the lights parameters, the artifacts become less apparent, but still there.

What's going on?

P.S.: I'm using 3ds Max 2024 and Corona 10 Hotfix 2
Title: Re: Shading artifacts when using sheen
Post by: maru on 2025-06-03, 15:38:38
Is it the same in IR and production render? Asking because sometimes such squares may appear in IR since the information about lighting is not re-calculated. It should go away if you run production render or restart IR.

If it happens in both IR and production render, I would suggest sending us the scene at https://support.chaos.com/hc/en-us/requests/new so that we check what might be going on.
Title: Re: Shading artifacts when using sheen
Post by: lightwriter on 2025-06-03, 15:57:45
Is it the same in IR and production render? Asking because sometimes such squares may appear in IR since the information about lighting is not re-calculated. It should go away if you run production render or restart IR.

If it happens in both IR and production render, I would suggest sending us the scene at https://support.chaos.com/hc/en-us/requests/new so that we check what might be going on.

Yes, unfortunately I get the same results, even if I restart IR or run a production render.