while looking for doors to use on my spawn rooms I noticed a "door_slide_large_dynamic.mdl". This appears to be a door that has built-in animations for opening and closing. At the same time none of the door tutorials I've found so far have listed or made use of this model. My question is: is this something that can actually be used in a map, or is it something that was designed for non-gameplay purposes? The other question I have is whether or not it's easier to utilize this door or if I should just follow existing tutorials in making good doors for my map.