Here is a terrain tutorial I made. Its about 40 minutes long.

http://vimeo.com/11781231

I hope this tutorial will help people create better looking maps. I'm always seeing badly modeled maps that could have more potential. So, I went and created this. Hopefully it will help people in the end.

It covers -

Outlining base mesh
Creating mesh
Smoothing the geometry
Creating terrain/cliffs
What your final outcome should be

Its pretty simple.

Sorry about the voice quality (it is pretty shitty ), you can blame my xbox mic since I don't have another.

Thanks to il Duce Primo and Bungie for showing me how to model properly~

-Higuy