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Question by liszto · Feb 28, 2012 at 06:16 AM · shadertextureblackself-illumination

modify one color of a texture

Hi, I'm trying to do something which ccan be very usefull in a lot of case but I don't know how to start. I got a texture (UV texture form a graphist apply on an associated mesh). I want in this texture modify all the black parts to change their color and give her a self-illuminated look, how can I do that ? All leads, ideas or solutions are welcome :)

Thanks in advance !

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avatar image GC1983 · Feb 28, 2012 at 07:28 AM 0
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Youre wanting to modify certain parts of the texture? Not the entire texture?

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Answer by liszto · Feb 28, 2012 at 08:02 AM

Yes just one color of my texture, only the black :)

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avatar image Paulius-Liekis · Feb 28, 2012 at 11:42 AM 0
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Please, don't post comments as answers. And welcome to UnityAsnwers!

avatar image liszto · Feb 28, 2012 at 01:43 PM 0
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Ok :). I didn't see the comment button. No worry I don't do it again now !

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Answer by Paulius-Liekis · Feb 28, 2012 at 11:43 AM

Look into AssetPostprocessor class. There are callbacks which are called before texture import and after. You have to set texture to readable and then you can simply do GetPixel and SutPixel (and don't forget to call Apply).

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