I've watched a couple of tutorials about this node but it doesn't cover the desired effect I'm needing or the instructor isn't very good at describing all the steps. My goal is to render a diffused decal on top of a base layer using architectural materials.

I understand how to stack the miaX shaders in the mix node (base goes in slot 0 and the decal in slot 1 of the color section), and the alpha into the Weight 1 slot. The result however, is the decal covering the base layer completely. No masking at all.

I have no idea how to get it to work, nor do I understand how to get the color mix onto my object. I've piped the mix node into the color slot of several different type of shaders but it renders black.

BTW, Mode 1 has been set to Mix, Multiply and Add to no avail.

Does anyone know how to get this node to work in the manner I'm trying?