Let me be the first to say that I am in way over my head. I run a side business where I make signs for local companies. Part of that process is making concepts, where I lay out the design in a black and white image, then overlay whatever texture the sign is going to be over that image. In the past, I've outsourced this process but I want to do it myself as to avoid waiting on the other party. How do I do this? I have looked for tutorials, and I can't find any. I have attached an example of what I am talking about. So in affinity photo, how do I take the black and white image, make the white transparent, then overlay whatever texture of choice over the black?
I had this image already outsourced.