- The player is not subject to gravity.
- The player's z-movement is completely unrestricted (i.e. he/she is allowed to fly above ceilings and below floors). This is the main thing that separates it from standard NOCLIP + FLY.
The big advantage to this would be allowing players to NOCLIP above and below 3D floors easily. As it is, using standard NOCLIP alongside 3D floors is really tricky since you're still blocked from moving up or down where the 3D floor is present.
It doesn't seem necessary to expose this behavior to other actors, since I think that applying +NOINTERACTION is close enough to this effect as far as non-players are concerned (since giving +NOINTERACTION to players has trippy side effects). But don't let that stop you from adding it anyway if I'm wrong or it's easy enough to do.
