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Design CSS Masks

Joseph Falconer
Joseph Falconer
Courses Plus Student 15,887 Points

How to make the alpha png mask in Photoshop properly??

I've managed to make a black and white png that looks like Guil's but the white part isn't showing transparent. I know how to keep the transparency when saving but what I don't know is how to get that alpha mask exported with all its magical powers as a png... If that makes sense