I downloaded these excellent free sand materials:
Then I converted them in UE4 with Omniverse connector to MDL materials.
I can drag these sand materials on my plane in Machinima :) Great!
But how can I finetune the materials, like native Omniverse materials I have the Albedo Add, Brightness and Color Tint. They are so good tools.
With these imported MDL materials I have only the tiling setting as you can see from the above screen capt.