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Great stuff. And many thanks for those tuts by Jason! They helped me a lot.
Those animations look amazing!! Great job!
Take a look at a free sand material created in Substance Designer by Derk Elshof. Having a hard time dealing with the ground? Study this breakdown and build your own substance.
A material study of sand with pebbles and seaweed. A fully procedural material made with Substance Designer.
I uploaded the .sbs file to Gumroad in case people want to see a breakdown of it.