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I saw this from Lee Griggs and I wonder if there's anything similar in Cycles: https://docs.arnoldrenderer.com/display/A5NodeRef/clip_geo

I know something similar is possible with the shader nodes: Cycles. Masking objects with shaders (no compositor)

But as you can see, the inside part in the Cycles version looks empty, the geometry is just missing. Whereas in the Arnold version, the geometry is still solid.

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  • Correct me if i'm wrong, but, looks like boolean modifier – Emir Jul 25 '20 at 04:24
  • Might be useful: https://blender.stackexchange.com/questions/109614/fake-bool-operation-with-osl-shader and https://blender.stackexchange.com/questions/39962/boolean-on-cycles-rays-not-on-mesh – Serge L Jul 26 '20 at 20:08
  • It is not a boolean, it is a shader. Though you can somewhat obtain similar results with modifiers, it's quite different in terms of impact on performances and you can do different things with a shader (like driving it from a texture) that is way harder to do by boolean. – L0Lock Jan 06 '22 at 14:42

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Apparently, it's doable only with a boolean? I think I saw a node setup once which was quite close but I can't find it anymore. There's also Blender BIM which now I'm going to test. But if anyone has a better idea, please, let me know.

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