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noone

creating a animated soft color

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You can do that with vertex shader by giving each vertice a color and then gpu interpolates between those points. Or you can do the calculation in fragment shader to get more refined look.

Here's an example how it could be done with fragment shader https://www.shadertoy.com/view/tls3zS

For info on how the color palette is done read this article http://www.iquilezles.org/www/articles/palettes/palettes.htm

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