Here's a WIP on a map of the Xorian Mountains, from Paizo's Golarion campaign setting. These are in the Abyss, part of Lamashtu's realm, and there's not much world lore beyond that. I've decided they're extremely arid and barren.
Progress so far: I poked around on Terrain.party until I found a neat area and exported a height map of the area. Here it is.
Xorian Mtns Height Map.png
This is an area in western Colorado about 20x20 kilometers.
Then I followed a lengthy but good tutorial on YouTube rendering shaded relief in Blender. It came in six parts: 1, 2, 3, 4, 5, 6 plus a followup tutorial on how to use the resulting shaded relief image in Photoshop. For the most part it was pretty straightforward and easy to follow, though there have been some changes to Blender since that tutorial was produced that I had to work around. The main one was that the subdivide tool has a cap on how many subdivisions you can add at a time now. I left a comment explaining my workaround for that on the video which discusses subdivision.
After a couple hours working through those tutorials and getting familiar with Blender, I came up with this shaded relief image:
Xorain Mtns shaded relief 02.png
The tutorial creator assumed that you'd have access to some other source of data for providing color in the image. He used a hypsometric tint, and referred to adding satellite imagery. I have no idea how to get those things, and anyway this is for fantasy cartography. So I used his techniques for setting up the Photoshop layers and started basically painting my own colors in. Here's what I've got so far.
Xorian-Mtns-rev-2.jpg
I think it's off to a decent start, but I'm not sure what to do with it from here. I want the place to be a barren trackless waste. But at the moment it's just too empty. I may go spend some time just looking at satellite images of barren desert mountains -- perhaps something on the border of the Gobi -- for some ideas as to what to add to it. Any suggestions or feedback would be welcome.