I see the images I posted and the images @theluthier posted as similar, For the distant mountain images a similar level of detail can be added but more pronounced so that it’s still noticeably from afar or is often the case scaled down. I hope that sounds clear, it does in my head.
If you look at the image on the right, on the right side where the rock and grass come together, at the bottom of the tall cliff, the detail could be more pronounced with more contrasting color between grass and rock, with exaggerated sharper edges on each step of the cliff.

Sorry, trying to draw with a mouse.
But having said that our mountains are not as far away as in the images I posted, or we might have to add a few more trees for a dense forest to give the illusion of distance. And also notice the 5 images I posted are from an elevated position which also adds to the visual beauty.