Is a "ray-destroying" material possible?

Asked Mar 06 '22 at 16:15

Active Mar 06 '22 at 16:15

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I have a hole like this:

I want only the "positive side" of the hole to be visible. Backface culling seemed promising, but I also need to hide the geometry behind the backfaces...

My idea was to give the backface some material that would tell the renderer "dont render me and anything behind me" - effectively a ray-destroying material. Is this possible? Thank you very much in advance!!

asked Mar 06 '22 at 16:15

Vojta Šára

https://blender.stackexchange.com/questions/2082/how-can-i-make-a-material-only-apply-to-a-side-of-a-plane – Duarte Farrajota Ramos Mar 06 '22 at 16:25
@Duarte Farrajota Ramos, I think that it's not exactly what he wants, he wants to be able to see through the object itself – moonboots Mar 06 '22 at 17:23
@Vojta Šára, You can mix a Holdout with a Diffuse (or whatever) into a Mix Shader and use a Geometry (Backface output) as factor – moonboots Mar 06 '22 at 17:47
in Eevee don't forget to set the Material > Settings > Blender mode to Alpha Blend and disable Show Backface – moonboots Mar 06 '22 at 17:48

Is a "ray-destroying" material possible?

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