Discord: https://discord.gg/pATupFuJ42

LethalOptimizer v1.4.0

Performance optimization mod for Lethal Company on low-end PCs.

⚠️ Warning: On powerful hardware the effect may be minimal or unnoticeable. This mod is designed for weak devices. ⚠️ Warning: I don't have the opportunity to test the modification in detail, so there may be errors.

What's New in v1.4.0

Added:

• Interior Culling System — new optimization system for dungeon interiors:

  • Room Culling — disables rendering for distant rooms
  • Light Culling — disables lights and shadows in distant rooms
  • Portal Culling — hides rooms behind closed doors
  • Interior LOD — hides small details (wires, debris) at distance
  • Interior Physics Culling — freezes physics for distant objects

• Ship Item Optimizations — new system for ship items:

  • Item Collision Optimization — disables collisions between items in ship
  • Item LOD — hides small items at distance
  • Ship Distance Optimizer — hybrid optimization based on player distance

Fixed:

• All API compatibility issues with game source code
• Removed non-existent method patches (CalculateThreatLevelOfPosition, CheckVisibility, etc.)
• Fixed coroutine patches (StartIdleAnimation, AimGun)
• Fixed private method patches (MakeScreech → MakeScreechNoiseServerRpc)
• Fixed player patches (removed non-existent SetHoverTipAndCurrentInteractTrigger, PlayerLookInput)

Installation

Install via mod manager or copy DLL to BepInEx/plugins/

Configuration

All optimizations can be toggled in config: BepInEx/config/com.lethal.optimizer.cfg

Config sections:

• 1. General — general settings
• 2. AI General — Distance Optimization, NavMesh Cache
• 3. AI Enemies — individual settings for each enemy
• 4. Traps — settings for each trap
• 5. Graphics — Low-End Mode, particles
• 6. Interior — Room/Light/Portal culling, Interior LOD
• 7. Ship Items — Item collision, LOD, physics optimization
• 8. Network — network optimizations
• 9. Player — player optimizations
• 10. Other — objects and UI

Compatibility

• Lethal Company v50+
• BepInEx 5.4.x
• Compatible with most mods