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Funny.. when I was trying to learn how to do this it completely escaped me.  Today running on about 3 hours sleep (had nasty battle with a UV map last night) just taking a quick peek at your shader....  it just clicks .. I totally get it.. so simple!

Hah! Glad I could help ;)

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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.