what settings y setup for materails or shaders in marmoset? it's a pbr metalnes?
https://assetstore.unity.com/packages/tools/terrain/mapmagic-world-generator-56762 procedural terrains with nodes released on 2016 Support Pahunov NOT UbiSoft
9:46 - actually I have a solution for You ;) Try this setup instead of LandscapeCoords node: https://drive.google.com/file/d/1N4FMmG4TtRjI8TPTHqD6kKcKolbYGZs0/view
Hendrik Schoenmaker has finally released TexTools for Blender. UV and texturing parts can be difficult to deal with, so this free tool will help you save a ton of time.
Here is a nice overview from the developer:
UV Layout tools
You can find documentation and get the tool here.