The most i discover, more i am impressed.
Skyline material has many detail maps slots for diffuse and normal.
It's a great way to add micro details or quickly make materail variations
But one option could be added : a detail UV scaling value for each detail map.
Defaul value 1 scaling is like actual detail map, another value scaling is used on UV size, increasing value would tile a lot the detail map on the model.
This would allow us to scale up or down the detail texture UV mapping on the model instead of relying on the model UV and on the detail map texture size ?