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Is there a way to set a color to each vertex of a polygon and have they blend to form a gradient between them?

A great example of this would be the HSV triangle from Coolorus (first image on the right). That triangle has a white vertex, a black one and a yellow one. That cannot be made by hand using linear gradient as far as I know.

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    You could do it in Illustrator with a gradient mesh.
    – Cai
    May 11, 2016 at 1:23

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The easiest way to do this may be to apply multiple Gradient Overlay layer styles to your polygon, each set to Multiply with a different angle. It'll just be a matter of calculating the angles required.

enter image description here

Here's a triangle with this three-gradient thing applied (very loosely, the angles are very rough). It's by no means perfect, but it might be as close as you're going to get.

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  • That can't be done. A triangle when divided into 3 don't give 3 rectangles, but three more triangles. Unless there's a triangle gradient that I don't know about, it's not possible. I tried it already, and I do get close, but it's not useful in my case. It needs to be perfect. See: i.stack.imgur.com/slHHe.jpg
    – Mister R.U.B.I
    May 11, 2016 at 1:13
  • Yeah, I see what you mean. Close but no cigar.
    – Alex
    May 11, 2016 at 1:21
  • Well, I guess I need to write my own program. Thanks anyways.
    – Mister R.U.B.I
    May 11, 2016 at 1:23
  • or, as @CAI suggests above, use Illustrator
    – Alex
    May 11, 2016 at 1:27

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