s3o = collision sphere for weapons and model..? for movement.*
3d0 = collision via hitbox for movement and weapon collision*

Show here is the s3o weapon collision. Note that the sphere is the only place it hits. This REALLY sucks. Tall features cannot work as a s30

Here is a low shot:
http://cs.selu.edu/~ssmith/spring/screen086.jpg
here is a shot directly at the sphere:
http://cs.selu.edu/~ssmith/spring/screen087.jpg
and one through the top:
http://cs.selu.edu/~ssmith/spring/screen088.jpg
As far as the movement:
http://cs.selu.edu/~ssmith/spring/screen084.jpg

here is our 3do weapon collision. As you can see any point in the model can bit hit! IT WORKS, it will hit any point from the footprint to the height(178)... or so I thought. Still aircraft can fly through and shots will hit weird if the terrain tilts the thing... but for your pleasure here are the images. showing the different hits.
Shooting the bottom:
http://cs.selu.edu/~ssmith/spring/screen089.jpg
Shooting the middle:
http://cs.selu.edu/~ssmith/spring/screen090.jpg
Shooting the top:
http://cs.selu.edu/~ssmith/spring/screen091.jpg
BUT WHEN IT IS TILTED BY THE TERRAIN!
it hits where the hit box would be if it were straight!
http://cs.selu.edu/~ssmith/spring/screen092.jpg
and where it is not.. there is none.
http://cs.selu.edu/~ssmith/spring/screen093.jpg
*both of which are super-ceded by aircraft pathing
If you do not believe me/want to see for yourself.
Here is my test map(utilizing noize's painted desert map
I recommend testing it with a unit that can fire HUGE distances.
The post is DONE! Feel free to reply now.