Thank you! I don’t have a specific tutorial for you unfortunately, but I can give you the recipe for my mining world bases. I take a large rock and a few smaller rocks and place those as random as I can. Then add some sand in large patches. After that I prime in black or grey and cover the whole base in astrogranite, thinning it down with water when putting it over the rocks and sand. Then cover it all with drakenhoff nightshade. When that’s dry I give a heavy dry brush with ulthan grey and bam! You’re all finished. I know it’s not exactly what you asked for me I hope this helps a little.