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Basically, I'm trying to understand how to generate a procedural mask. I'm trying to make an eye and I wanted a mask to make a difference between cornea and sclera, but the problem that I have is that I don't understand any of this as my eye ball just goes from solid white to solid black.

I can't seem to find or locate anything to make this mask for my eye.

How do people use these nodes to generate masks on objects? I really don't understand them.

enter image description here

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    $\begingroup$ maybe show a picture of what you want and what you've tried $\endgroup$
    – moonboots
    May 5 '20 at 17:03
  • $\begingroup$ I added a picture, all values give me black. $\endgroup$
    – user15147
    May 5 '20 at 17:25
  • $\begingroup$ Hey :). Please add an image of what you want. For people who aren't well versed in eye anatomy (me). $\endgroup$ May 5 '20 at 18:41
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If I understand correctly, you could use Gradient Texture for that.

  1. Add Gradient Texture set to Linear (default)
  2. Use ColorRamp to control it.
  3. Done

enter image description here

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