Sim Update Beta 4 Discussion Thread

[SealedPaladin73]

These betas seem to have a long tail, you think they must be nearly there and they keep going another month.

[BragRaindrop933]

Release notes

Sim Update 4 Beta (1.6.16.0) Release Notes - October 16, 2025

[image] RELEASE NOTES Sim Update 4 - 1.6.16.0 If you are playing on PC, outdated packages in your community folder may have an unexpected impact on the title’s performance and behavior. If you suffer from stability issues or long loading times, move your community package(s) to another folder before relaunching the title. Stability & Performance Fixed a crash occurring when switching Antialiasing Add new Multiplayer replication models option (High Fidelity/Simplified) Fixed an issue that c…

[Maxisone]

Is there a bug thread for this ? Because i don’t recall seeing any (but i have seen the issues you are talking about.)

[Tuskin38]

No patch on Steam yet

[DrVenkman3876]

There’s a bug thread for the frame rate limiter issue - it affects Nvidia cards too.

1.6.7.0 - Actual FPS Is Less Than Set Max Frame Rate

ISSUE DESCRIPTION Description of the issue: When setting max frame rate in MSFS settings, the resultant FPS is 1 FPS less than what was set, despite my system being capable of much higher when unlocked. This is new with 1.6.7.0. Now, to have a 40 FPS lock I need to set MSFS max frame rate to 41 FPS. FREQUENCY OF ISSUE How often does this occur for you (Example: Just once, every time on sim load, intermittently)? Every time. REPRODUCTION STEPS Please list clear steps you took in order to help o…

Can’t speak to the night light artifacts issue.

[RogueNaught1]

And in case you were referring to this one…

Weird graphical artifacts around cockpit at night on AMD RX 9000 Series GPUs

ISSUE DESCRIPTION Description of the issue: Weird artifacts around edges of objects, sometimes even in the middle of the screen. The problem appear only at night, not during daytime. Did you experience this issue before you joined the Beta? No [PC Only] Did you remove all your community mods/add-ons? If yes, are you still experiencing the issue? Yes FREQUENCY OF ISSUE How often does this occur for you (Example: Just once, every time on sim load, intermittently)? Every single time i try i…

[CraderBug]

Just wanted to report back- i no longer have the issue! That patch fixed it!

[TFEV1909]

I just did a flight with the A350 on Vatsim, EGLL to EBBTlR. With SU3 I could not really use the A350 due to the stutters and low FPS. With SU4 beta I am able to achieve almost steady 60 fps. Unbelievable, what an increase in performance!

I5-10600k / 3070 / 32 GB

[hobanagerik]

I’ve had it rarely. Not sure what triggers it.

@madeinblue

you can also notice that if you stay on 3rd person cam for 1min and come back to cockpit everything is reloading during few seconds and vice-versa, as it was unload from memory

It would be good to have an option to stop that from happening. I’ve been outside a plane for no more than 10 seconds or so, and back in the cockpit the dials are all blurry.

@PaRaBaS6435

Nothing special

There are some crash fixes in there which are good for everyone.

[aceridgey]

I haven’t had a moment to test new BETA, how’s the VRAM performance?

I noticed usage creeping up during builds of su4 beta

[Maxisone]

That one is known and i’ve voted in it already but thanks.

[Maxisone]

This is the one. Voted ! thanks !

[Zavarese]

For me, patch 1.6.16 was excellent. FPS improved, VRAM usage decreased, improved fps stability during landing, and nighttime lighting is great.

The only thing that needs improvement is AI traffic, as there are still some crazy aircraft on the runway and AI vessels that sometimes hover over the ground.
I don’t use FG, DLSS performance at 4K, all settings on high. LODs at 100.

RTX 5070, Ryzen 9700X, 32GB RAM, NVMe Gen4 2TB.

[LovesickChief13]

Oh wow! This is really good. Smoooooth. Awesome lighting. Sunset flight in the 172 just now was beautiful. Kudos to the Devs

[A68yoSniper]

Well not so good for me. Some stutters in VR and more black lines in the water around SFO.

[dectenor1]

Anyone noticed with the new night lighting there is always a sort of ring of haze around the aircraft?

[CurrentFoil3744]

issue where the Flightsimulator2024.exe stays active after shutting down the SIM

Yes, I’ve had this with at least betas .13 and .15, and I think as early as .11.

[Unic0m]

For those who are on the SU4 beta, I have a question since I’m not currently using it. Are you seeing any improvement at 3rd party airports that were “compatible” with 2024 and not native? For instance, with VerticalSim KTPA, folks have been seeing stutters since it was launched. Works flawlessly in 2020. Devs have admitted that the compatible versions have these issues… just curious if anyone has seen improvement in SU4 with similar products that were having issues in SU3.

[CurrentFoil3744]

@meh1951

Using DLSS the gauges are still blurry. Is this something they are working on?

I see blurry gauges now and then, but with a AMD graphics card and FSR3, and have through the last few beta versions. I hope it is being worked on, too!

[meh1951]

DLSS worked so well in 2020.