Ringworld is an artificial world, it's a ribbon of material, a million miles wide, encircling a star, along roughly the orbit of earth. along the edge are giant walls 10 thousand miles high, that hold the atmosphere in. It has 2 great oceans on opposite sides of the ring to help keep it ballanced. to provide day and night there are giant sun shades, that orbit closer to the sun, and create shadowed blocks across the surface of ringworld.
When setting up this map, you will want to make mountains impassable, and make sure that you change the recources that are normally found on mountains to other terrain. All movement will be up and down the big 'valley' formed by the mountains. the mountains are 3 squares wide to provide protection from your city boundaries from crossing it, and your workers going off on wild goose chases to improve the terrain on the other side of the great barrier.
I'll do some resource tweeking later, and fix the need for do it yourself stuff.
Chizzy
