http://udn.epicgames.com/Three/VideoTutorials.html#3D%20Buzz%20Video%20Tutorials%20-%20Using%20UDK A bit old for some things today, but still great to cover the basics ! :)
Tonight was try to figure out how to sculpt a garbage bag night. There will be like 20 of these in a big pile... for bottom of stairs. Crit is always more than welcome!
You're better equipped with a grasp of both. If you're having trouble breaking barriers at 20, you may want to think of another field of work in all honesty.
no. often collision can be much much simpler than the real geometry. nobody will notice... i think you could approximate it wwith less then 20 colliders..