That’s interesting. I guess I was so focus on making terrains to work that I forgot about how will characters walk up or down those hills. I will make that part of the things to do.
Regarding the map size, I believe what you suggested will work, so any size below 10x10 should not be a problem. However, the performance with 20x20 might be too slow to generate, maybe like 8 seconds? For now, the 10x10 map generated in 2 to 3 seconds under the heaviest settings (max number of trees and buildings) with my cpu i5 3570. Everything is done through blueprint so things might get faster once I move it to c++.