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How to paint texture with white color? Example what I mean: enter image description here

SpriteBatch.setColor changes tint only.

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A simple shader should be enough. – luiscubal Feb 4 at 13:39
If you want to do this permanently, just write a for-loop over all pixels and if Alpha>0 then set Red, Green and Blue to 255. – Ivan Kuckir Feb 4 at 18:14

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As indicated above, simply implementing a pixel shader to change the color would be sufficient. Other than that, you could swap out textures on the fly. That is a bigger performance hit though, by far.

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