I'm impressed by how easy it is to use Models in XNA and because of this I'm demoting my render engine to line drawing only. Here is how I went about getting Models into my game.
- First you will need software to create models and Autodesk has a free version of just that. Autodesk Softimage Mod Tool 7.5
- Watch this video so you can create and export your 3D models correctly. The video series and blog post can be found here.
- Third you can follow the Microsoft tutorials to get your models in game Microsoft Tutorial on displaying a 3D Model or you can continue the blog from the previous step.
- Finally you will need some video tutorials on how to use Autodesk to create more complex models. XSI Video Tutorials