Engine.ini edits to fix texture fuzziness and potentially triple FPS!

One of the main problems I've encountered with Subway Sim 2 is texture blurriness/fuzziness, poor TAA implementation, and artificially limited FPS to ~60 while the GPU is not even being utilized to its full extent. I figured like most UE games, engine.ini edits would come to the rescue, but there is no default engine.ini in the game folder to edit. However, you can create one yourself!

Engine.ini

One of the main problems I've encountered with Subway Sim 2 is texture blurriness/fuzziness, poor TAA implementation, and artificially limited FPS to ~60 while the GPU is not even being utilized to its full extent. I figured like most UE games, engine.ini edits would come to the rescue, but there is no default engine.ini in the game folder to edit. However, you can create one yourself!

BEFORE (62FPS)
AFTER (152FPS)

First navigate to the following directory.

 C:\Users\[YourUsername]\AppData\Local\SubwaySim2\Saved\Config\Windows\ 

In this folder, create a new blank text file and save it as Engine.ini

Add the following to the file:

 
[SystemSettings]
r.TemporalAA.Algorithm=0
r.TemporalAA.Upsampling=0
r.TSR.History.SampleCount=4
r.ScreenPercentage=100
r.SceneColorFringeQuality=0
r.PostProcessAAQuality=4
r.Tonemapper.Sharpen=1.5
r.MotionBlur.Max=0
r.MotionBlurQuality=0
r.DefaultFeature.MotionBlur=0
r.DefaultFeature.AntiAliasing=2
r.Streaming.MipBias=-1
r.MaxAnisotropy=16
r.Lumen.DiffuseIndirect.Allow=1
r.TemporalAA.Quality=3
r.TemporalAA.Samples=8
r.TemporalAA.FilterSize=0.8
r.TemporalAA.ShutterSpeed=100
r.TemporalAA.R11G11B10History=1
r.TSR.Sharpen=1.5
r.TemporalAACatmullRom=1
r.TemporalAA.CurrentFrameWeight=0.2
r.TemporalAA.HistoryScreenPercentage=100
r.TemporalAA.Stabilization=1
r.Lumen.Reflections.TemporalAccumulation=1
r.Lumen.Reflections.ScreenPercentage=100
r.Nanite.Streaming.MinimumScreenSize=0
r.Nanite.Tessellation.ScreenSpaceError=0.5
r.Streaming.PoolSize=[INSERT YOUR VRAM HERE]
r.TextureStreaming=1
r.MipMapLODBias=-1
t.MaxFPS=0

[ConsoleVariables]
r.TemporalAA.Upsampling 0
r.ScreenPercentage 100

[/script/engine.engine]
bSmoothFrameRate=false 

NOTE You must insert an amount in megabytes next to the r.Streaming.PoolSize= entry above. I recommend setting it as your GPU's total VRAM minus 4. I have a 4090 with 24GB of VRAM, so I put 20000.

Then save the file.

IMPORTANT: You must make the engine.ini read only otherwise it will delete itself upon exit of each game session. So right click on the file and then hit properties and check the "read-only" box.

Finally, open the GameUserSettings.ini file that is already present in the directory and add this line to the bottom:

 bSmoothFrameRate=false 

Then save the file.

That's it! You should see improved anti aliasing, less blurry textures, less ghosting, and vastly improved FPS especially if you have a powerful GPU.

Notes:
- This guide is optimized for high-end PCs. I tested it with an RTX 4090 and high-end CPU.
- FPS increased from ~62 to 130–180 FPS depending on the scene.
- Lower-end systems may need to tweak a few of these values for stability.
- Ensure you have the game set to full screen, the FPS uncapped, and anti-aliasing set to TAA in the in-game settings for the best experience.

[Red John]

Thanks for the guide and the effort — really appreciate it.

At first it did help to some extent: my FPS increased from ~28–31 up to around 40–50, which was noticeable.

However, even at 40–50 FPS the image didn’t feel perfectly smooth. Despite the FPS counter showing higher values, there were still noticeable microstutters, making the motion feel uneven.

After minimizing the game once and restoring it, the performance dropped back to 28–31 FPS and stayed there. So unfortunately the improvement doesn’t seem to persist in my case.

For reference, my system specs are:
CPU: AMD Ryzen 7 9800X3D
RAM: 32 GB
GPU: RTX 5080 (16 GB VRAM)
Resolution: 4K

Still, thanks again for the effort. Hopefully the developers will release a proper patch or fix at some point, so the game can actually run smoothly on high-end hardware.

[ixvst01]

@Pandemik_SU Yeah a lot of the recent updates have fixed the things that the ini edits attempted to address from the early release. The engine.ini still shouldn’t delete itself though as long as you set it to read-only in properties.

[Pandemik_SU]

It probably doesn't work anymore unfortunately. The Engine.ini is deleted directly after the game starts. :(

[kuzin]

Thanks! It helped, but still, there is a something like "light view distance". When I am at underground turnaround I cannot see the end of the tunnel from the station, despite the fact, there are lights everywhere...

[Krater]

It's easier to provide the directory path using %localappdata%:

`%localappdata%\SubwaySim2\Saved\Config\Windows\ `

[denis.doyen]

Hello and thank you for following this topic.
I've noticed that since patch 2 I no longer need your settings, especially in the tunnels, which I find quite dark.

[ixvst01]

@wsw765 The first version of the guide I put out had some issues. I updated it recently. Make sure you see the r.Lumen.DiffuseIndirect.Allow=1 entry. If it’s 0 then that will cause global illumination problems. If that still doesn’t fix it then I’ll have a look tomorrow since the recent patch could have affected things.

[wsw765]

The game runs really smoothly, thanks! My tunnels are now as bright as day, though, which wasn't the case before. Global Illumination Quality is set to very high?! Any ideas?

[ixvst01]

@Glendathu Yes, I noticed the same thing after playing some more of the tunnel heavy routes. Thanks for pointing it out. I updated the guide with r.Lumen.DiffuseIndirect.Allow=1. In addition, I found removing this line also helps with the dark lighting: r.Lumen.Reflections.HZBOcclusion=0. This was messing with the ambient occlusion.

[Glendathu]

It turned out that with the engine.ini I now had no more darkness in the tunnels.

Without the engine.ini I had to turn Global Illumination Level to high and Reflections to medium to get Darkness in the tunnels.

So I tried to deactivate some lines in the engine,ini and it turned out that I had to change the value

r.Lumen.DiffuseIndirect.Allow=0 to

r.Lumen.DiffuseIndirect.Allow=1

Now I have no more blurry instruments AND dark tunnels