PeakOptimizer

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I originally made PeakOptimizer because playing in big multiplayer lobbies was turning our games into literal slideshows.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 mostly touches engine logic under the hood instead of modifying textures or reducing visual quality, you can safely use it alongside graphics mods, like HDPeak.

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.

Configuration

All settings can be customized in: BepInEx/config/com.reis.peakoptimizer.cfg

1. General

Setting — Default — Description

MasterEnabled — true — Master toggle for all PeakOptimizer systems.

EnableTelemetryHUD — false — In-game developer telemetry overlay toggled with F9.

2. CPU & Multithreading

Setting — Default — Description

EnableBatchedPhysics — true — Runs voice linecasts and wind shelter checks on background worker threads.

EnableZeroGCBuffers — true — Eliminates GC heap allocation freezes during rockfalls and physics loops.

EnableMultiplayerFixes — true — Optimizes distance loops and bot searches in multiplayer lobbies.

3. World & Environment Culling

Setting — Default — Description

EnableFoliageAndTrapCulling — true — Pauses physics updates for distant foliage and traps beyond 50m.

FoliageAndTrapCullDistance — 50.0 — Distance in meters beyond which foliage physics and traps are paused.

EnableSmallPropCulling — true — Culls tiny decorative ground pebbles beyond 50 meters.

EnableAmbientParticleCulling — true — Puts distant torches, braziers, and idle trap particles to sleep beyond 50m.

AmbientParticleCullDistance — 50.0 — Distance in meters beyond which distant ambient particle emitters sleep.

4. Graphics & Rendering

Setting — Default — Description

EnableShadowOptimizations — true — Disables secondary Citadel torch shadows and fixes terrain shadow acne.

EnableGrassFrustumCulling — true — Skips procedural grass generation outside the camera view.

TerrainLodBias — 0.6 — Multiplier for distant terrain detail (0.6 = recommended, 1.0 = vanilla).

5. Experimental

Setting — Default — Description

EnableHiZOcclusionCulling — false — Experimental Hi-Z chunk occlusion culling (Disabled by default).

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/.