lighting: The auto-exposure system is still being modified; RC3's light levels are the same as RC1/RC2. Third party developers can get detailed notes on the state of lighting and how to update in the X-Plane developer lobby. RC3 does change how brightness is managed in glass displays; authors should enter the real world max luminance of their displays. We expect to be able to re-enable auto-exposure to improve the look of the sim under various lighting conditions next week. Flight model: Airfoil critical mach number improved. Transsonic airflow over wings improved, particular in swept-wing aircraft such as airliners. Developers can watch Austins explanation video for more information

• XPD-13524 - Warning and quit when loading Aerolite.
• XPD-13489 - Multi monitor clouds rendering error when both monitors are at different resolutions.
• XPD-13516 - Shader missing on RC1, AMD.
• XPD-13403 - Crash With Out of Bounds Shader Constants at Shader Build Time.
• XPD-13015 - Runway light spills WAY too bright on ground.
• XPD-11770 - Make library.txt and .for files carry 1200 version numbers.
• XPD-13526 - Updated luminance for various objects.
• XPD-13515 - Can only load 4 saved flightplans in alphabetical order into Citation X FMS.
• XPD-13514 - dataref sim/weather/barometer_current_inhg not consistent with pressure measured by the altimeter.
• XPD-13513 - Can't delete hold from flightplan in Citation X FMS.
• XPD-13512 - Can't access missed approach on the Citation X FMS.
• XPD-13505 - Aerolite toe brakes inop.
• XPD-13502 - Dev assert when loading sit (soun.has_master_bank()).
• XPD-13499 - KingAir nav lights don't create spill.
• XPD-13491 - Autogen and World Terrain libraries version 1200.
• XPD-13486 - VelocityOne Joy Files.
• XPD-13450 - acf_throtmax_FWD set to above 1.0 does not increase MPR.
• XPD-12697 - Request: Ability to toggle misc objects on and off on the fly.
• XPD-13144 - King Air External Lights Not Showing / Landing Light Wrong Location.

X-Plane 12, built by pilots and engineers – for everyone.

• Volumetric 3D Clouds
  
• Physics-Based Photometric Lighting Model
  
• Worldwide 3D Water
  
• Rewritten AI Air Traffic Control System
  
• Global 3D Forests
  
• Seasonal Textures and Weather Effects
  
• Revamped Real Weather Data

• Airbus A330
  
• Cessna Citation X
  
• Lancair Evolution
  
• Cirrus SR22
  
• Piper PA-18 Super Cub
  
• Van's RV-10
  
• F-14 Tomcat
  
• Robinson R22 (plus a floats version)

• OS: Varies
• Processor: Intel Core i3. i5. i7. or i9 CPU with 4 or more cores. or AMD Ryzen 3. 5. 7 or 9.Memory: 8 GB RAM
• Memory: 8 GB RAM
• Graphics: A Vulkan 1.3-capable video card from NVIDIA or AMD with at least 2 GB VRAM
• Storage: 23 GB available spaceAdditional Notes: We have developers using Ubuntu 20.04 LTS and newer successfully. however we dont provide support for specific distributions. We require proprietary GPU drivers.

• OS: Varies
• Processor: Intel Core i5 8600k or Ryzen 5 3500 or betterMemory: 16 GB RAM
• Memory: 16 GB RAM
• Graphics: A DirectX 12-capable video card from NVIDIA or AMD with at least 4 GB VRAM
• Storage: 23 GB available spaceAdditional Notes: We have developers using Ubuntu 20.04 LTS and newer successfully. however we dont provide support for specific distributions. We require proprietary GPU drivers.