How to reduce color depth of a rendertexture/material?

Hi there!

I'd like to know if there is a way to reduce the number of colors that are used to render a rendertexture. Is there a way to set the colors to 65k, 256, 64 and so on?

Thank you in advance!
garv3

 

Check out available texture format here http://docs.unity3d.com/ScriptReference/TextureFormat.html
One that might interest you is RGBA4444, meaning 4k colors.
However, if you want this effect for artistic reasons you might want to write shader for it

 

Hi Alex!
Thank you for the answer. Unfortunately this does not work for my renderTexture. If I use RenderTextureFormat.RGBA4444 I get the error "RenderTexture.Create failed: format unsupported."

So how may I do this using a shader?

Thanks again!

 

You may try to use following algorithm. Create a look-up texture with dimensions 1 : x, where x is number of values you want to have per colour channel and fill it with black-and-white gradient. For example, for 4096 colours you need to create texture with dimensions 1:8 pixels. Then use original rgb values as v coordinate in that texture and return it's colour instead. However, this shader will use 4 texture lookups, so there might be a more efficient solution