how to make substance material (subtance designer)

Yeah, as the question asks

I"m playing around with the program, but I wanted to know if there is a good tutorial how to make them

I mean, the publishing company (maker of the SD program) put out a lot of their own substances, and wanted to know the process

Also, can substances be made from already made textures (photos, ect)

Edit: Sorry, used wrong term I think…I think they’re called procedural materials

You can call them substances…at this point I think most people will know what you mean. Anyway, Allegorithmic has a bunch of tutorials on their site to get you started: Substance Designer: First Steps. I would also recommend their YouTube page: Allegorithmic on YouTube. Lots of information to be had there.