This is a playable world,go to http://froggerspond.enjin.com and register for mob warrior access.
World was created with world painter. Added frost layers to make the terrain smoother, really like that effect. Trees and mushrooms added in with world painter also. Then I use world edit to paint the trees the colors I want, added small cabins and changed them to a desired block thats fitting to the theme I'm working on. Everything is spontaneous, no real plan, Like a painter painting a picture.

This is a functional Mob Arena, it has custom mobs, crackshot weapons, all customized to my taste, so far I think its really fun so Im adding more to it as I test the arena out. It is just one giant arena to tromp around in and blow things up, Ill be adding more advanced guns like a grenade launcher and a minigun and special powerups and so forth. Maybe a new lobby area as well.