Transparent texture to make other textures/buttons partially transparent

Help Shaders
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1

Godot Version

4.2.2

Question

Let’s say I have this button/texture. And the square is a color rect with transparency at 100%.

image
image898×412 3.24 KB

What I want is to make it so the square hides the button/texture, and you can still see the background right behind…

image
image993×398 2.57 KB

In this example the square would be transparent and the black background would be a real texture