Modular Master Material for vertex painting, you can input masks or individual textures as needed.
Newer work is towards the top while the Older work is towards the bottom.
Started using Anthony Vitale's(Lead Environment Artist at Ready At Dawn Studios) tiling texture workflow.
Version 1 brick cobblestone
Version 2 brick cobblestone
Older Work(Not using new workflow):
Dirty Brick Texture
Rocky Dirt Texture