New topography themes take the most time when working them up with the first country. In this case a semi Africaesqu with rift valleys and a canyon land. Coming up with the look and techniques takes forever. Still it helps to find real world pictures of features that the terrain editor polygon mesh will support.
I'll be using this as a canyon building guide. I've been working on an illusion of these features in the rift valley crack at the edge of the terrain.
I'm thinking about a canyon system to break up the vast 5000ft high green area in the back of each country. The canyons will be cut 6 miles wide down to 500ft. Then I'll use the elevation tool to step the walls up at every 500 or so feet to create a terraced look from a 1-2mile wide bottom of the canyon.
This takes time with so much detail but, I've created the two rift valley upthrust ranges and need some remnant elevations in the river valley. Then I can put those in place for two more countries. At least it will go faster now.