Make material always culled.

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Is there a way to make a material that will always be invisible (ie. anything using it will not be rendered). Simply setting the material to be completely transparent might not save as much processing.

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Answer by phxvyper · May 11, 2015 at 01:25 AM

If you don't want any attempt at rendering it at all:

You can disable any component attached to a game object by setting the enabled property to false.

 gameObject.GetComponent<Renderer>().enabled = false;

If you still want the camera to attempt to render it:

You can change the Alpha of a material's color to 0 (transparent):

 someMaterial.color.a = 0;

Sources:

http://docs.unity3d.com/ScriptReference/Material-color.html

http://docs.unity3d.com/ScriptReference/GameObject-renderer.html

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RLin · May 11, 2015 at 01:28 AM 0

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Will it truly cull the material, or will it try to render a transparent mesh... Basically, anything with the material should in theory behave as if it had its mesh renderer disabled, except that only parts with that material are disabled, not the whole thing.

phxvyper · May 11, 2015 at 01:36 AM 0

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@RLin I didn't completely understand that you wanted it to just not render.

I added some new info in my answer. The game object itself will exist in space, but it will not render.

phxvyper · May 11, 2015 at 03:44 AM 0

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Did it work?

RLin · May 11, 2015 at 08:14 PM 0

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I guess that was unclear. I'll explain the whole thing. I create sketchup models and import them. The trouble is, sketchup always exports back faces even if export two-sided faces is not checked. To fix this, I made all faces I wanted to cull a single material. Because it is the same mesh, disabling the mesh renderer will disable parts that are still supposed to be rendered.

phxvyper · May 11, 2015 at 10:59 PM 0

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In that case I think you're out of luck. Maybe you can import it into another program like 3ds max or maya (there are free copies provided by autodesk) and modify the materials from there, then export from there.

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Make material always culled.

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