Build 25776977

New
- Rooms now have doors. Walk into a door to swing it open. Enemies on the other side get knocked down.
- Some doors slide. Press F to open or close a sliding door. Enemies cannot open these, so a sliding door holds a pack back.
- The breach has four new rooms: Gauge Room and Sump on floor 2, Charnel and Reliquary on floor 3.

Changes
- Floors 2 and 3 are rebuilt with fewer rooms, and each room has one clear idea.
- Doorways between rooms are now short passages that you walk into. Rubble or a rock fall blocks each way that your route does not use.
- The way down on floor 2 is not always in the same place. It can be in two different rooms and in four different spots.
- Some rooms change from raid to raid. For example, the pump in Pump Hall is on in some raids and off in others.
- Rooms get more crowded as you go deeper into a floor. The last room before the way down holds the most enemies.
- The room where you arrive on a floor has no enemies, so you can regroup there.
- Enemies now appear in a room just before you get there, out of sight.
- Enemies far from every player stop and wait until somebody comes near. If you get far enough away, a chase stops.

Fixes
- The pits on floor 2 were invisible but still blocked you. Now you can see them.
- Starting a raid no longer freezes the server for up to a second.

Server
- Test: the server sends updates 15 times a second instead of 30. If other players or enemies look less smooth than before, tell us.