I have a few maps like this laying around (one on a napkin I've been eyeing, in fact) I like the update so far and yay! for layer masks. I just figured out how to do those myself.

For the mountains you said you didn't think side-view would fit with what you have, so have you considered the "caterpillar" style? (Korash is working on something with this: https://www.cartographersguild.com/s...ad.php?t=46376 and I saw some brushes the other day for this type of mountain design: https://www.cartographersguild.com/s...ad.php?t=39622) Possibly a direction to go. Looking forward to seeing where this goes!