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.
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"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"