The Low Resolution Ultima Maps Project seeks to transform worlds from different games, just to see how they would have looked if they were made on a Ultima 4 like engine. Enjoy!
What is the LRUMP
Published
Tales of a Video Game Developer
Slashie's Journal 
How about Vvardenfell, or Skyrim? Or Guardia or Dominus?
I’ll eventually tackle The Elder Scrolls 🙂