Okay, I'm going to try and explain this as best as I can. A while ago I came across a free software program (I think Microsoft makes it) that people could download and use to create entire worlds! It was a 3D modeling program that created very realistic effects, and they said they designed it so that even the most amateur of people could use it. Now, I acctually have a use for it, but I can't remember its name, or find it... Would anyone happen to know the program I'm talking about?