I find calm no rush modeling in Blender very relaxing. This is one of those "calm sessions". :-) See its final version (also as an UE4 Unreal Engine project) here: https://www.artstation.com/marketplace/p/7eB8N/sci-fi-city-landscape-ue4
Testing in Unreal Engine
Test flight around this asset in Unreal Engine
Most actual iteration 2021-03-30