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I have a sun lamp at 90 degrees to a curved mesh. In Eevee, the shadow renders as smooth. However, in Cycles, I get these black artefacts - entire faces on the shadow edge are black.

How do I fix this? I've played around with the mesh normals, material settings, etc. No luck.

enter image description here

Update I fixed this with Subsurf modifier. Is there a better way?

Tom Wright
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    https://blender.stackexchange.com/questions/1998/cycles-shadows-on-smooth-shaded-mesh-strange-behavior https://blender.stackexchange.com/questions/91913/some-areas-of-the-mesh-are-dark – Duarte Farrajota Ramos Mar 12 '21 at 12:18

1 Answers1

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Shadow Terminator Offset

you can find this setting in Properties ‣ Object Properties ‣ Shading

increase it to 0.15 which is really enough

Note: this is a new feature came in blender 2.90 so you need to update blender to some newer version

enter image description here enter image description here

Note

This property artificially alters the scene’s lighting and is not energy conserving and consequently not physically accurate.

Got from the blender Manual: https://docs.blender.org/manual/en/2.90/render/cycles/object_settings/object_data.html#shading

Mihin Dissanayake
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