This is a map I made where the terrain is build out of Tetris shapes. If I had been thinking ahead I would have made each line have an empty (water) space so the line doesn't "clear" or made some of the last pieces at the top fit together better, but I didn't want to undo everything already done. The different aspects of the map that are shaped into Tetris pieces are sized differently so they don't all overlap in the same way. River outlines are build from 6x6 squares, terrain and trees from 5x5, and hills from 4x4. Trees and hills each have a "boarder" tile to separate them from adjacent shapes so they all don't just blend together. Resources are randomized. If anyone cares to, go ahead and steal this idea if you can do it better.