0.13.5.4 is now available!

Hello! This patch cycle is once again focused on bugfixes, as a lot of dev attention has been on the next terrain, the new challenges it's creating, and other behind the scenes work.

The major changes this patch, with links to the posts in which they are discussed, are:

[h2]Changelog[/h2]

New Features:
- Added real (64 by default) and virtual (256 by default) audio channels to audio settings tab
- Minimum airspeed that can be read by an aircraft is now configurable on a per-aircraft basis

Improvements:
- Cockpit design changed so that ONLY the cockpit is in the cockpit model, no more duplicated geometry (e.g. fuselage in both models)
  + "Third person" parts of the model such as the canopy bow are hidden when in first person
  + First pilot automatically hidden when in first person
  + Cockpitless planes no longer require special h andling regarding camera clip planes
- AV8B model updated for new cockpit modeling workflow and removed unused vertex colors
- AV8B no longer uses unique shader
- Near clip plane for ALL cameras is now 0.05 (most were 1.0)
- Far clip plane for ALL cameras is now 100k
- When escape menu modal dialogs are open, escape will close it
- Floating origin now applies in the vertical

Bugfixes:
- Page selectors on database mode now work
- Instant action wing selector pages should work correctly when multiple pages are visible
- Pressing escape during the pause menu while settings or bindings are open won't continue game
- Fog and clouds no longer disappear when loading Instant Action after Arena
- AI aircraft flying in formation automatically switch back to nav mode
- Cockpit no longer shakes at higher altitude
- "Investigate" AI behavior correctly accounts for floating origin
- "Idle Orbit" AI behavior correctly accounts for floating origin
- "Climb" AI behavior correctly accounts for floating origin
- Arena icons no longer appear for a single frame near origin when a unit spawns
- Camera text correctly accounts for the floating origin
- Radar altimeter and shadows should be handled better when flying "out of bounds"
- Paging for the wing selector and database selector should work correctly for edge cases
- When vehicles fall off the navmesh, they instead report (with error messages) that they did, but also shouldn't call any invalid NavMeshAgents
- Optimized how stores weight is calculated (was an unexpected bottleneck)
- Changes to audio mix to hopefully reduce missing engine sounds
- Afterburner thrust value no longer affects aircraft if no afterburner is available
- AV8B MFD Cruise page minimum speed IAS/TAS now matches the Game HUD minimum speed
- Landing gear can no longer be raised/lower post-ejection
- Terrain raycasting better accounts for vertical floating origin
- Aircraft no longer spawns underground in Arena if a new sortie

JSON:
- Warning shown in log when collider is missing
- Added "HideInFirstPerson" list to aircraft definition (see AV8B JSON for example)
- Added "Avionics" property to aircraft with sub-property "MinDisplayedAirspeedMPS"