Physic models

Pallorwag

<div class="IPBDescription">looking for info on compiling physics or collision models</div>I'm working on a map. The current displacement tool distorts the textures. If the terrain geometry gets too unusual. I want to use models for the bridge pathways instead. Chops created a nice video tutorial set for model compiling with builder. There isn't anything on physics or collision models though.

1. How do I prep the model in max or blender?
2. What do I need to type for the compile file?
3. (optional) solution to displacement texture stretching?

Thanks