RELEASE NOTES Sim Update 4 Beta - 1.6.27.0

Regression Fixes

• Fixed a regression where the sim will hang when zooming in and trying to load into airports with a high Terrain Level of Detail Setting in the Northern US.

General Bug Fixes

• Several VR fixes:
  • Authorized the toolbar in VR in external view
  • Saved the state of panels when switching between VR and not VR
  • Plugged in the aircraft HUD in VR, it is de-activatable with the options as it is outside of VR
• Fixed visual effects being rendered when material is invalid (was drawing wireframe quads instead of expected effect)

EFB

• Fixed the EFB was not accessible in VR when there was a cockpit screen behind
• Fixed an issue causing black arrows to be displayed in numeric fields of the EFB.

Marketplace

• Fixed Marketplace being inaccessible after long game sessions

Virtual Reality

• Fixed Broken VelocityBuffer blurring anything in the right eye sky.

thx. 2.47GB through MS Shop, downloading now

Some of the VR users should be a bit happier.

Edited November 20, 2025Nov 20 by bobcat999

12 minutes ago, bobcat999 said:

Some of the VR users should be a bit happier.

Yep it's been a long wait but at least they managed them before Beta ends (which looks close now), I wonder if this one in particular actually fixes the massive regression fiasco of SU7 4 years ago as MSFS2020 toolbar apps were affected by Asobos incompetence with that god forsaken update and are still broken to this day, I'll check at the weekend;
- Fixed the EFB was not accessible in VR when there was a cockpit screen behind

Certainly feels like we're getting close to release...

4 hours ago, bobcat999 said:

Some of the VR users should be a bit happier

Like this VR user:

SU4 beta 1.6.27.0, DLSS4 preset K - today's latest Nvidia hotfix driver 581.94 - VR mode 45 fps - Pimax Crystal light - approaching Sequim Vallley W28. totally smooth. this VR user couldn't be any happier. A general aviation RW pilot in MSFS 2024 wonderland.

ok, ok, I admit, no inibuilds airliner, no EGLL, no traffic ...... but none of that is what I need in MSFS or required in my real world flying either. 😀

Edited November 21, 2025Nov 21 by turbomax

Happy Asobo fixed this regression: Fixed a regression where the sim will hang when zooming in and trying to load into airports with a high Terrain Level of Detail Setting in the Northern US but not this one:

Since SU2/SU3, the drone camera collides with the building meshes, making it impossible to enter terminals — the camera is pushed up to the roof or blocked outside.

This feels like a regression, because exploring interiors with the drone was possible before, and was a nice feature for immersion and for checking scenery quality-annoyingly not fixed yet.

3 hours ago, turbomax said:

SU4 beta 1.6.27.0, DLSS4 preset K - today's latest Nvidia hotfix driver 581.94 - VR mode 45 fps - Pimax Crystal light - approaching Sequim Vallley W28. totally smooth. this VR user couldn't be any happier. A general aviation RW pilot in MSFS 2024 wonderland.

Wow, couldn't wait for the SU4 release. By you estimate, how much is the % VR fps increase in SU4?

29 minutes ago, FlyIce said:

how much is the % VR fps increase in SU4?

"I know that I know nothing"

except that it is totally smooth.

59 minutes ago, FlyIce said:

Wow, couldn't wait for the SU4 release. By you estimate, how much is the % VR fps increase in SU4?

At my end. 9900x3d and 5090 rtx 64gb Ram it is 20% at most areas. But often more.

Example

Eddf Aerosoft and 777pmdg. With AI traffic sliders half (roughly 50 to 75 AI planes) it was roughly 45 fps max now 55 to 60. CRZ above Europe it was 50 now easels 65 to 70.

 

 

Edited November 21, 2025Nov 21 by mpo910

A ~20% increase is quite impressive.

Right now with my FOV clipped Pimax Crystal Light using OXR Toolkit, I get mostly around 45fps in SU3, often dip to 40fps. Bringing it up to solidly over 50fps would be great. 

   

Yep SU4 has seen a big improvement for VR users performance and smoothness, good timing for my new GPU arriving tomorrow  it's good enough currently on my 3070ti if that's any indication.

This update borked Foveated Rendering for VR users. I had to turn it off which dropped FPS significantly. It makes the clouds wobble and flicker. I’m glad to see they are working on VR and hopefully they get it sorted quickly. But gotta admit, I’m quite surprised they introduced these VR changes so late in the Beta. I sure hope this doesn’t get released in this state. I know it’s not an issue just impacting me:

https://forums.flightsimulator.com/t/clouds-wobble-and-flicker-using-foveated-rendering-in-sim-update-4-beta-1-6-27-0/747737

This sea of purple is starting to get annoying.

1 hour ago, Gulf76 said:

This update borked Foveated Rendering for VR users. I had to turn it off which dropped FPS significantly. It makes the clouds wobble and flicker.

not "for users" in general, perhaps just with DYNAMIC (eye tracking) foveated rendering ON? my Pimax Crystal Light supports only FIXED foveated rendering and I have not observed the cloud wobbling that you describe. can you try fixed vs. dynamic foveated?

but glad they finally introduced FOVEATED rendering in VR at all (DYNAMIC FOVEATED rendering is max. resolution only in a small area where the eye is currently looking, vs. FIXED foveated, a small  fixed area around the screen center) to enhance fps even further.

I don't use OXR nor HDR, which was reported to cause problems.

https://forums.flightsimulator.com/t/hdr-enabled-causes-ctd-with-foveated-rendering-pimax-crystal/714094

Dynamic Foveated Rendering Problems

Dynamic Foveated Rendering (DFR) on the Pimax Crystal Super has been reported to cause various issues, including crashes and performance problems. Here are some common problems and solutions:

Edited November 21, 2025Nov 21 by turbomax