This project is very interesting. Actually, I was thinking of sharing resources with my works on HD field screens, to maintain consistency. I'll admit there's very little I can provide at the moment, but I know one case on which we could start a collaboration. The case in question is the battle screen for the sewers, whose field screens were completed last year. I could share most of my textures or point you to how I made some (there may be some procedurals involved in some of them). Let me know if you're interested, and when you have some time to get back to this project.