ODS was converted for SF2, and from what I understand, the terrain textures haven't been updated? There are some very high quality terrains for various other regions however, Germany for example now looks comparable to most modern combat flight sims.
"You know what the chain of command is? It's the chain I go get and beat you with 'til ya understand who's in ruttin' command here."
- Jayne Cobb, "Firefly"