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You can add multiple texture slots in texture paint mode, to act as a sort of 'layers'. You then add all of them with their own texture node and combine the 'layers' with MixRGB nodes.

But, you can create textures with different background colors and somehow Blender knows for each of the textures what that color is and to treat it as 'transparent' when blending the texture layers. How does it know that color?

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  • $\begingroup$ When you create a new texture using the Texture tab in the Properties Panel, in the "New Image" settings box that pops up, one of the available options is "Color.* $\endgroup$
    – R-800
    Commented Jun 24, 2020 at 21:38
  • $\begingroup$ Ah I thought that was just what was used to do the initial fill, but it makes sense when you think about it. Thanks. $\endgroup$
    – Roel
    Commented Jun 25, 2020 at 7:24

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