Wow that looks so cool. Nice touch with the bit of pointillism.
I'm curious about your mediums, is the mountain more of the acrylic paint or the sharpie pens?
I start off with the blue color scheme in acrylic (regular tube) to get the background tones then I paint directly with a brush the general look of the mountains in acrylic as well, and go back with paint pens and fine tip brushes to bring out the details and highlights... long slow process and the pictures don't really show off the brush strokes well or the fine details... Still learning how acrylic paint moves on the surface & how to achieve certain effects. I usually paint with watercolors though… and my subjects is always peoples dogs. Here is a watercolor I did a while ago of a wolf.