I just based my landscape material on this. I just wish I could exactly figure out what is going on with normals, ao and displacement here.
That was extremely helpful! Thank you!
Well, small/medium intuos pro is way cheaper that iPad Pro + pencil... just saying... And it works better with ZBrush...
Pixel Perfect Polygons has recently released a new Grass Mountains Landscape that provides an excellent 64 square kilometers of playable area. The pack will help you build different AAA scenes, so check it out.
Texture size: Up to 4K – One 8K BaseColor template, downsize as you wish.
 Material Instances
 Material Functions
You can learn more here.