3D virtual immersive environments (VIEs) do not have to be 100% realistic. In fact, take advantage of the fact that you can do anything in 3D worlds and leverage that advantage. For example, if you want to create a gathering place for avatars, you don’t need to put it under a roof or even have it indoors. Since weather is not a factor in 3D VIE you don’t need a roof over your head. Also, put things close together that aren’t normally close together. If you are creating a corporate campus to mirror your own corporate campus, you don’t need large distances between buildings. Also, consider creating concept spaces instead of actual spaces. For example, if you want to teach about surgery. Create a giant surgical theatre that is larger than the real space so that lots of avatars can gather around and watch.