Lockheed Martin Releases Prepar3D v4.5 Hotfix 2

Lockheed Martin has issued a new hotfix for Prepar3D v4.5. The new hotfix, available now, and brings the simulator to version The new hotfix brings a few new features along with additional improvements, particularly…

Posted: 26-Sep-2019 @ 15:11z
Lockheed Martin Releases Prepar3D v4.5 Hotfix 2

Lockheed Martin has issued a new hotfix for Prepar3D v4.5. The new hotfix, available now, and brings the simulator to version The new hotfix brings a few new features along with additional improvements, particularly to Virtual Reality (VR).

According to the blog post made on Lockheed Martin’s Prepar3D website, the new update improves the VR experience by automatically hiding the VR mouse cursor when not in use, providing additional calibration options and also the ability to enable eye tracking by default. In addition, a brand new Eye Tracking demonstration scenario has been added to guide a new pilot through a representative aircraft startup. Developers will also be pleased to hear that there has been several new additions to the Prepar3D Development Kit (PDK), which includes advanced VR interfaces.

As per usual with Prepar3D v4 updates, only the respected installer is required to update the simulator. In the case for Prepar3D v4.5 Hotfix 2, the majority of fixes are present in the Client Installer. However, there is a range of changes present in Content, Scenery and SDK installers. The full list of changes can be found below.

As always, be sure to check that your third-party add-ons work with the new hotfix before updating to prevent any issues after applying the hotfix. You can download the update files from your download section, or redownload the whole simulator. If you need help installing the update, you can read the official documentation. Alternatively, you can watch Patrick’s video below for some handy tips and advice.

Prepar3D v4.5 Hotfix 2

Client Fixes and Improvements

  • Fixed Startup Screen UI issue where the incorrect date would be displayed after loading a scenario.
  • Fixed bug preventing SSAA from being applied on PBR objects.
  • Fixed issue where AI cargo doors would not close before taxi/takeoff in some cases.
  • Fixed issue where AI baggage carts could get stuck in the TAXI state causing AI aircraft to remain in the PreFlight state.
  • Fixed issue preventing pylons without attached weapons from serializing in multiplayer.
  • Tracer rounds now render in multiplayer.
  • VR recalibration origin can now be configured including an option to calibrate with a custom origin without triggering calibration from OpenVR.
  • Fixed crash that could occur when DIS labels were active with high traffic settings.
  • Improved fallback logic when a container title is not found in the DISEntityTypes.xml.
  • Fixed bug where attach points would not animate in some cases.
  • Fixed several positioning bugs with mixed reality portals.
  • Improved portal editing including the ability to modify their PBH and name.
  • Added FOV edit mode for VR controllers.
  • Different shapes can now be used for portals including cylinders, spheres, and rectangles.
  • Gaze detection can now be enabled in VR settings.
  • Fixed crash that could occur when crashing the aircraft while using a Varjo VR-1 headset.
  • Fixed light and text sizing, g-effects, and inverted eye openness values in Varjo VR-1 headsets.
  • Fixed bug preventing 3D airport navigation visuals from drawing in some locations.
  • Fixed crash that could occur during scenario validation if VI sessions were empty.
  • VR mouse cursor is now hidden when not in use.
  • Tooltips are now stored in each pick request.
  • Fixed bug preventing VR tooltips from appearing if other external pick requests were active.
  • Added an AllowLoopback DIS option to allow processing of packets sent by the local machine.
  • Any VR interface can now be enabled on startup.
  • Fixed bug affecting the visibility of attached effects.
  • Added eye panel data to VR settings.
  • Fixed issue causing brightness in HDR to be too low in some cases.
  • Fixed issue where objects with PBR materials would have incorrect vertical positions in some cases.
  • Scaleform panels now serialize local variables (L:Vars) in multiplayer.
  • Added VR passthrough camera settings screen.
  • Fixed issues preventing weapon targets from recording and playing back correctly in some cases.
  • Simplified playback complete dialog text.
  • Entities will now maintain their current course when a PlayFlightRecordingAction completes.
  • Added CIGI auto-start capability.
  • Fixed issue where OnCompleteActions would not fire after AI completed a waypoint list.
  • Improved VR tracker calibration including the ability to use a tracker puck as the camera origin.
  • Fixed bug where add-on airport LLA would not be updated in some cases.
  • DIS pull to ground is now on by default.
  • DIS pull to ground now uses CG height instead of the bounding box for placement.
  • DIS pull to ground transition is now smoothed as well as clamping pitch and bank.
  • Added button to calibrate eye tracking for Varjo VR-1 headsets.
  • Fixed issue where add-on land class textures would not be loaded in some cases.
  • Stereo mode now supported for Vive Pro Eye passthrough camera.
  • Improved handling of alpha values in terrain vector textures.
  • Eye tracking in supported VR headsets is now automatically enabled.
  • Fixed issue where airport runway secondary landing attributes would be ignored and processed as primary landing attributes.
  • Added VR Tuning Guide to the Learning Center.

Content Fixes and Improvements

  • Fixed incorrect fire weapon voice control binding and added default fire gun command.
  • Fixed DIS enumeration for wander boat.
  • Fixed text display, target distance, and target aspect angle issues in the F-16 HMD overlay.
  • Removed the momentum effect from the Virtual Cockpit Only camera.
  • Fixed visibility issues with the explosion flak effect.
  • Added Eye Tracking Demonstration Scenario.
  • Moved F-16 eyepoint forward slightly.
  • Fixed default DIS entity mappings for Lowboy Semi-Tractor Trailer and Tanker Truck Yellow to prevent collisions.

Scenery Fixes and Improvements

  • Fixed incorrect transparency values in several autogen objects.

SDK Fixes and Improvements

  • Fixed incorrect ordering of C-gauge tokens.
  • Fixed variable naming for ISimObject attachment units and updated documentation.
  • Fixed missing GetGeneralTimeOfDay function in the IGlobalDataV430 interface.
  • Custom SimObject properties that override native SimVars now work over SimConnect.
  • Added an OpenGL Panel sample.
  • Updated the picking sample with an example of using world ray interrogation.
  • Fixed a memory leak in the Custom Icon sample.
  • Fixed bug preventing columns from being customized in the Traffic Toolbox tool.
  • Added an Eye Tracking SDK sample.
  • Fixed UV channel optimization issue causing vertex count mismatches in some cases.
  • Added addition simulation categories to SimConnect_RequestDataOnSimObjectType.
  • Added additional VR SDK interfaces.
  • Added world object PDK service to create, place, and remove objects by GUID.
  • Added world object PDK service sample.
  • Added OpenCVStereoCamera PDK sample.
  • Fixed crash that would occur when using the panel system InitializeVarByName function.
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Calum Martin
Calum has been an avid fan of Flight Sim since the release of FS2000 and has developed his love for aviation ever since.
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