Materials I've created over while learning substance designer, rendered in marmoset. All of them were created with the help of these tutorials
1. Getting Started with Substance Designer | Adobe
2. Ultimate Environmental Texture Creation Course | Emiel Sleegers
3. Creating Roof Tiles in Substance Designer | Daniel Thiger
4. Creating an Aged Wood Texture in Substance Designer | Derk Elshof
5. Plaster Wall with Parameter-driven Bullet Holes | Daniel Thiger
Mine look different to their tutorial counterparts because I didn't follow the tutorials one to one, instead I adapted their techniques added my own additions/tweaks, adjusted parameters to my liking and explored a lot too.