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Reduce Banding on Point Lights ?

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Hi guys,

 

I'd like to try dithering my point lights to reduce the appearance of banding. I was thinking I can randomly perturb N, L, NL, or the attenuation or brightness factor.

 

I'm not sure how to do that though. I know I can have an array of random values inside the shader, or use a texture. What I don't know is how to choose those random values. I don't want different offsets everytime the camera moves or it will look like static on a TV.

 

Also, perhaps you know of a better way to reduce the banding effect ?

 

Thanks a lot.

 

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I personally never had this problem with lighting; I found it more apparent for backgrounds and I'd try to fix it using some post-processing effect.

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