Abiotic Factor: Best Config for Cooperative Science FPS

The primary challenge in Abiotic Factor is the exponential increase in light-source calculations as players place more lamps and deployables. In 2026, the key to a stable coop session is disabling the high-frequency Lumen updates and optimizing the network “tick rate” to prevent the dreaded “rubberbanding” when multiple scientists are interacting with objects simultaneously.

Configuration Directory

Abiotic Factor stores its configuration files in the local AppData folder. You will need to manually create the Engine.ini if it does not exist.

• Config Folder: %LOCALAPPDATA%\AbioticFactor\Saved\Config\Windows\
• Sandbox Settings: %LOCALAPPDATA%\AbioticFactor\Saved\SaveGames\<SteamID>\Worlds\<WorldName>\SandboxSettings.ini

Technical Note: After applying edits to Engine.ini, right-click the file, select Properties, and check Read-only. The game often attempts to reset these values to default on launch.

Optimized Engine.ini Configuration Block

Add the following parameters to the bottom of your Engine.ini to disable the most taxing UE5 lighting features and improve multi-core CPU utilization:

Parameter	Recommended Value	Technical Purpose
r.DynamicGlobalIlluminationMethod	0	Completely disables Lumen; the single biggest FPS fix.
r.Lumen.DiffuseIndirect.Allow	0	Removes indirect light bounce, saving significant GPU cycles.
r.Nanite	0	Disables Nanite micro-geometry (useful for older GPUs).
r.Shadow.CSM.MaxCascades	2	Reduces shadow detail levels at distance to boost FPS in large halls.
gc.AllowParallelGC	1	Enables parallel Garbage Collection, reducing stutters in coop.

[/Script/Engine.RendererSettings]
r.DynamicGlobalIlluminationMethod=0
r.ReflectionMethod=0
r.Lumen.DiffuseIndirect.Allow=0
r.Lumen.ScreenProbeGather.RadianceCache.ProbeResolution=8
r.Shadow.CSM.MaxCascades=2
r.ShadowQuality=2

[SystemSettings]
r.SceneColorFringeQuality=0
r.MaxAnisotropy=8
r.MotionBlurQuality=0

HowTo: Optimizing the Cooperative “Host” Experience

If you are hosting the session locally, your PC is handling both the game client and the server logic. Follow these steps on GameEngineer.net to stabilize the session for your friends:

1. Anti-Aliasing Type: In Display settings, set this to TSR (Temporal Super Resolution). If you have an RTX card, use the OptiScaler mod to force DLSS, which is better at handling the game’s fine scientific equipment textures.
2. Dedicated Server Move: For groups of 4+, move your save to a Dedicated Server. Even a local dedicated server running in a separate process handles “Network Ticking” more efficiently than the in-game “Host” button.
3. Sandbox Tweaks: Open your SandboxSettings.ini and set LootRespawnEnabled=False. High loot respawn rates in large facilities create thousands of active physics objects that the host must sync to every client, causing massive lag.
4. Global Illumination: Set the in-game “Global Illumination” to Lowest. This effectively toggles the engine flags we modified in the ini, but the ini method is more permanent for 2026 patches.
5. Clean Up Your Lab: Avoid placing hundreds of small items (like pens or screwdrivers) in a single room. Each object is a networked actor; use storage containers to keep the “Active Actor” count low.

Technical Explanation: Lumen and Network Actor Sync

Abiotic Factor’s reliance on Unreal Engine 5 means that every light source (Flashlights, Flare Sticks, Lab Lights) triggers a Global Illumination recalculation. In a coop setting, if six players are all using flashlights in a dark sector, the GPU must calculate light bounces for all six sources simultaneously. By setting r.DynamicGlobalIlluminationMethod=0, you revert to a static/traditional lighting model, which can double your FPS in dark areas.

Furthermore, the game uses Server-Client Actor Replication. Every time a scientist picks up an item, a packet is sent to the host. If the host’s CPU is struggling with the Lumen calculations, these network packets are delayed, leading to “Faraday Errors” or items disappearing. Prioritizing CPU headroom via the gc.AllowParallelGC flag ensures the server logic has the priority it needs to keep all scientists in sync.