Fall Guys: Best GameUserSettings.ini for Physics Sync Speed

The objective is to minimize Input Delay ($L_{input}$) and maximize the Update Frequency of the physics engine by decoupling it from non-essential graphical post-processing.

Setup & File Navigation

1. Directory Path: Press Win + R, type %LOCALAPPDATA%\FallGuysClient\Saved\Config\WindowsClient\, and hit Enter.
2. The Target: Open GameUserSettings.ini.
3. Pro Tip: If you use the Epic Games Launcher, the folder might simply be under FallGuys. Look for the most recently modified .ini file.

Optimized “Physics Precision” Configuration Table

Parameter (INI Tag)	Recommended Value	Technical Purpose
FrameRateLimit	144 (or Monitor Hz)	The Sync Fix. Caps FPS to prevent CPU jitter during physics updates.
bUseVSync	False	Eliminates the frame-buffer delay that causes “heavy” movement.
sg.ShadowQuality	0	Disables dynamic shadows to free up CPU cycles for collision detection.
sg.AntiAliasingQuality	0	Removes temporal blur, making it easier to see exact ledge borders.
sg.EffectsQuality	0	Simplifies the physics of slime and water splashes to save VRAM.

HowTo: Engineering the Unity Physics Pipeline

Follow these GameEngineer.net technical steps to achieve “Pro-Level” movement accuracy:

1. The Frame-Rate Cap Protocol: Unity’s physics engine ($PhysX$) often ties its simulation steps to the frame rate. If your FPS is wildly fluctuating between 200 and 300, your physics “delta time” ($\Delta t$) becomes inconsistent. Setting FrameRateLimit to a stable value (like 144 or 240) ensures a consistent Physics Tick Rate.
2. Shadow Culling for CPU Headroom: Every moving obstacle (the Big Yeetus, the fans) casts a dynamic shadow. Calculating these shadows consumes CPU cycles that should be spent on Collision Detection ($C_{det}$). Setting sg.ShadowQuality=0 removes this overhead, providing a smoother experience in high-entity rounds like “Tip Toe.”
3. The VSync Elimination: Enabling VSync in Fall Guys adds roughly $16-32ms$ of input lag. In a game about millisecond-perfect jumps, this is fatal. Ensure bUseVSync=False is set in the INI to allow for the lowest possible Button-to-Action response time.
4. Anti-Aliasing and Clarity: Competitive players need to see the exact edge of a platform. sg.AntiAliasingQuality=0 removes the “smear” effect of TAA. This results in a sharper (if slightly jagged) image that allows for much more precise Ledge Grabbing and diving.
5. Texture Streaming Pool: If you experience “stuttering” when a new round starts, add r.Streaming.PoolSize (if supported by your build) or ensure sg.TextureQuality is set to 2 (Medium). This prevents the game from saturating your PCIe Bandwidth with high-res bean costumes while you’re trying to calculate physics.

Technical Explanation: Client-Side Prediction ($P_{client}$)

Fall Guys uses Client-Side Prediction to make your bean feel responsive despite network ping. However, if your local simulation lags behind the server, a “Rollback” ($R_{back}$) occurs, causing your bean to teleport backward.

$$Total\_Latency = Ping + \frac{1}{FPS} + Physics\_Tick\_Time$$

By engineering your GameUserSettings.ini to reduce the $Physics\_Tick\_Time$ (by removing shadows and effects), you minimize the chance of a simulation mismatch. This means when you hit a platform, the server is more likely to agree with your client’s position, preventing that frustrating “gliding” feeling on the edges of tiles.