Collision detection: Envirnoment and Monsters

[Hoshikogi]

It's from my personal gaming experience that additional "collusion" added to objects tends to add a layer of lag to the environment (I'm not entirely sure why, but placing more invisable walls requires more system resources). FFXIV with it's current Crystal Engine generates enough lag as is (which may be the actual reason as to why it was finally reduced within the environment). However, the new graphics engine may handle such things more efficently and thus environmental/player collusion may be added back.