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Question by Dode · Oct 11, 2012 at 09:01 AM · shadersvaluetriangleslodformula

What does the LOD value for shaders represent?

Question: What does the LOD value for shaders represent?

So for example I have an LOD of 200. How many triangles does that mean it draws? Is there a formula for the amount of triangles it draws?

I read a paper which has a formula for the amount of triangles which was 4^(d+1) where d is the LOD. I am not sure if that was just something the author came up with or if it is a standard formula for amount of triangles. I thought I would check just in case. Any direction would be great.

Thanks.

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Answer by rutter · Oct 11, 2012 at 09:41 AM

Nothing quite so direct, I'm afraid. The idea with shader LODs is that it enables you to enable/disable various graphical features:

  • Each shader has an LOD

  • You can specify that shaders above a particular LOD will be disabled

See here for more information: http://docs.unity3d.com/Documentation/Components/SL-ShaderLOD.html

As far as triangle count, that will largely depend on the geometry you're rendering.

I feel like this isn't quite the answer you're looking for, but I hope it helps.

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