DE UDK Collision

I add the collision effects to the scene so when the character interacts with the game level, it won't go through walls or floors.

The acollision for the floors.

The collision for the pathway walls.

The collision for non-opened hatch doors.

Some collisions don't work all the time such as the lower hangar wall has open hole, but with collision it would cover all. The solution to fix the problem is to remove normal collision, and replace it with pre-collision, and I apply it by one piece.