You digital art this time looks like a combination of gidital and oil painting. When I use oil painting and do the sky, there are clouds done in impasto to give them more texture, somehow you reach this effect too.

Another what I like in your picture is the way how you have done the rocks, the surface that looked towards sky has also reflection of those pink-stained clouds, that gives the rocks light brown-pink touch. The shadow side is really good presented giving your picture, real 3 dimensional view.

It feels like you really like what you do and you consider everything to make your picture close to realistic. Cheers!