How to do make up using brush to draw

Hi all! I am doing a makeup game. I have it set up so that I can add hair, lips, etc. But how can I set it up to apply makeup on the face as you see in the picture?

I want to apply the makeup on the face using a brush.

I’m thinking I need something along the lines of having a mask and being able to reveal (or change the opacity maybe?) of a material on hover (or on click) to color in the mask. I think that’s an idea, but I have no idea how to implement that.

Any ideas?

Hey there @ForeverAutumn! So there’s a few of ways to pull that off. One of them you described is to just have a mask and paint it’s alpha on and that’d work fine, however you’d still need the ability to paint onto the texture at the correct location, so the other method (direct painting) is done the same way. I’ll grab you some resources below that might help you get started in the right direction!

You could use this, but instead of painting on the texture, you’d paint on the mask for the texture.

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Do you think this would work out?