Michi Cliffs is a random map similar to Arena, where players start with walls, and the edge of the map is covered in forest. Also, there are some cliffs that add variety to the map.
I tested this map using four players on a medium map. However, I had to keep on increasing the map size because the walls overlapped.
The player receives walls forests line the edges of the map, and cliffs dot the landscape. However, the map hardly has the feel of an arena. The name Michi Cliffs is a misnomer, as the map is not Michi at all, as it is a quite open map. The author states that there more trees. However, besides forests about 5 to 10 tiles deep at the edge of the map, the map is basically a frozen wastleland with mines, sheep, and boar scattered over the snow.
Visual Appeal: 2
As stated above, there are no forests placed on the map except at the edges. There aren't even single trees scattered across the map. The only thing that breaks up the endless snow are resources. Although forests, elevation, and lakes are coded into the map, they do not show up because the base_terrains in the code were badly specified.
Forests do not appear inside the player towns. Instead players have to walk a long distance to the edge of the map to chop their wood. There are about 5 to 7 straggler trees placed around the player's town center, but these do not last long. Other resources are well placed and are scattered on the map. However, the lack of forests is quite annoying, and it is hard to play a full game.
Note on AI behavior:
The standard computer AI cannot play this map at all, because it will use up the straggler trees to make houses and a mill and it won't build a lumber camp by the forests at the edge of the map. I often saw a huge amount of villagers gathered around their gold mines without a mining camp. Better AI's might be able to respond to the lack of forests, but they will not behave like a normal human player.
Look at the base_terrains you specified for the forests, lakes, and elevations. Sometimes it was set to GRASS or other terrains that do not exist. Another tip would be to significantly decrease the base size for player lands. Most scripts set this around 10. A base size of 40 will not allow room for elevation, forests, lakes and other terrains that avoid player start areas. Above all, just test your AI and make sure everything works properly before you declare your script finished.