I'm making a sun and I would like it to be a mix of colors - such that every face has a different color, like on a ColorRamp. So, I want the final thing instead of just being a flat orange color to also have some reds and yellows merging in with the orange so it's an array of different colors. How can I do this in Cycles, by using the node editor?

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    $\begingroup$ Is it possible you could upload some kind of mockup or reference image showing what you want? $\endgroup$ – gandalf3 Dec 15 '14 at 20:25

While you can assign a different material to each face on your model, I don't think that will give the result you want. I expect you want to use some noise to get colour variations, one way is to feed the noise into a colour ramp node.

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There are other noise textures such as wave, voronoi, musgrave or magic that can give varying results, you may even want to mix a couple together. Just experiment with the scale, distortion and detail values to get a variation that you like.

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  • $\begingroup$ It needs some kind of mapping coordinates in order for this to work. $\endgroup$ – PGmath Dec 15 '14 at 15:47
  • $\begingroup$ By default you get generated texture coordinates, if that doesn't give the desired result you can add a texture coordinates node to choose other coordinates and add a mapping node for adjustment if you want more control. $\endgroup$ – sambler Dec 16 '14 at 11:16
  • $\begingroup$ This one works great for me. I experimented with magic and wave to get what I wanted. Thanks @sambler $\endgroup$ – Chickenator Dec 29 '14 at 8:56

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