1. Press Windows + R, type in: %localappdata% and press Enter.

2. In the folder that opens, navigate to: \TSCGame\Saved\Config\Windows

3. Alternatively, you can manually go to: C:\Users\YourUsername\AppData\Local\TSCGame\Saved\Config\Windows

Note: If you don't see the TSCGame folder, make sure you've launched the game at least once.
The folder is created only after the game runs for the first time.

1. In the Windows folder, look for a file named Engine.ini.

2. If it doesn’t exist, right-click → New > Text Document → name it exactly: Engine.ini (make sure it’s not Engine.ini.txt).

3. Open the file with Notepad or any text editor.

4. Paste the following lines into the file:

[SystemSettings]
r.MotionBlur.Max=0
r.MotionBlurQuality=0
r.DefaultFeature.MotionBlur=0

5. Save the file.

1. Right-click on the Engine.ini file and select Properties.

2. At the bottom, check the box labeled Read-only.

3. Click Apply, then OK.

This prevents the game from overwriting the file after you close it.

Special thanks to sɐןnɟnsnʎ, who originally shared this solution with the community.
Without that tip, this guide wouldn’t exist!