And make it good. Use Blender 3d (Free) or unity3d (30 day trial). These can be used to make very good maps. Oh and don't just make new post about them all the time, update the post with new stuff. Unless you just put a box and a plane together, people love new worlds!
Super Cheese
P.s. FC, if you read this, can you tell us how long it will be before we get to play your underground level?
» Reply to CommentRe: How Do you become a person who helps to build stuff??
Just use Blender or Unity. You could even use google sketch up for the rough design. Supercheese, I am going to work on the tunnels under my level. I think it'll be big enough to hold 15-20 players.
» Reply to CommentRe: How Do you become a person who helps to build stuff??
I know that Sketchup isn't considered to be good for nothing but sketches, but it works fine for me.
Blender is a huge and very advanced program and I would love to learn how to use it, but it is just so far from all other apps I know that it would take a lot of time to learn how to use it for me. :(
My advice is that you start designing in Sketchup, unless you know someone who has the time to learn you how to work in Blender.
Both programs are free and your friend Google knows where to find them. :O)