Those of you that played CK1 may be aware of my mapmod Mappa Regnorum, the objective of which was to completely redesign the map, to make it more detailed in the playable areas and overall more historical.
I'm now working on a version for CK2. It's in early stages of development at the moment, and so far is really just a direct port of the CK1 version, with the areas added in CK2 (ie Arabia and Ethiopia) remaining the same as vanilla.
Some screenshots of what I've done so far. As you can see, there's still a lot to do before any kind of release will be possible.