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Using two color values per vertex in shader

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Hello, I just moved my terrain engine to shaders after a small introduction tutorial. I am using the primary vertex color to blend between 3 different textures. Still I would like to use another color to slightly vary the blended textures on a per vertex base. So the question arises: Can I also get another color than gl_Color into my vertex shader program?

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Hello,

"vertex attribute" was all I needed to hear :-) I just didn't come over these in my tutorials yesterday.

Thank you!

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