PeakOptimizer

A performance and stability mod for PEAK that improves frame rates, eliminates micro-stutters, and reduces CPU/GPU overhead.

What is this mod?

I originally made PeakOptimizer because playing in big multiplayer lobbies was turning our games into literal slideshows.

This mod focuses almost entirely on CPU, math, and internal engine cleanup. Things like moving voice and wind physics to background threads, and fixing laggy distance checks.

• Works great with graphics mods: Since this touches engine logic under the hood instead of modifying textures or reducing visual quality, you can safely use it alongside other traditional performance mods.

Features

• Multithreaded Physics: Offloads heavy background raycasts (voice chat obstruction, wind shelter) to worker threads.
• Zero-GC & Anti-Stutter: Eliminates GC allocation freezes during zombie targeting, and continuous physics checks.
• Multiplayer Optimizations: Fixes lag spikes in large multiplayer lobbies with many players.
• Hazard & Particle Fixes: Eliminates lava lag in The Kiln while keeping hazards working.
• Rendering & Shadows: Optimizes Citadel torch shadows, grass rendering, and fixes shadow acne on mountain terrain.
• World Culling: Pauses distant foliage physics.

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Configuration

Tweak or disable specific features in:
BepInEx/config/com.reis.peakoptimizer.cfg

Setting	Default	Description
MasterEnabled	true	Master toggle for all optimizer systems.
EnableBatchedPhysics	true	Runs voice and wind raycasts on background CPU threads.
EnableZeroGCBuffers	true	Eliminates GC heap freezes during rockfalls and physics loops.
EnableMultiplayerFixes	true	Optimizes distance loops and bot searches in multiplayer lobbies.
EnableFoliageAndTrapCulling	true	Pauses physics for distant foliage and traps beyond 45 meters.
EnableSmallPropCulling	true	Culls tiny decorative ground pebbles beyond 50 meters.
EnableShadowOptimizations	true	Disables secondary Citadel torch shadows and fixes terrain shadow acne.
EnableGrassFrustumCulling	true	Skips procedural grass outside the camera view.
TerrainLodBias	0.6	Multiplier for distant terrain detail (0.6 = recommended, 1.0 = vanilla).
EnableHiZOcclusionCulling	false	Experimental Hi-Z chunk occlusion culling (Enable at your own risk).

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Installation

With r2modman (Recommended)

1. Search for PeakOptimizer in the Online tab.
2. Click Download and launch the game.

Manual

1. Requires BepInEx 5.
2. Drop PeakOptimizer.dll into PEAK/BepInEx/plugins/.