Use BB's method of plugging a Color Math to Difference to extract a mask... I don't remember the specifics, but it involved plugging your no-makeup texture in one plug of the Color Math and the makeup one in the other.

This way, you won't need extra texture maps in your package.

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Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.