Settings

Settings

Optimum adds an Extra tab to the client settings dialog. All toggles default to ON.

Switches

Setting	What it controls	Default
Limit Background FPS	Cap to 30 FPS when the window loses focus	ON
Smooth Frame Pacing	Hybrid sleep/yield/spin frame limiter	ON
Skip Distant Shadows	Skip shadow draws beyond the distance threshold	ON
Skip Distant Collisions	Skip repulsion physics beyond the distance threshold	ON
Scale Light Range	Scale held-item light radius by view distance	ON
Reduce Distant Animations	Reduce tick rate for distant animated block entities	ON
Skip Foliage Far Shadows	Skip vegetation in the far shadow cascade	ON
Throttle Wind Updates	Cache wind speed for 4 frames instead of every frame	ON
Reduce Distant Particles	Skip particle emitters beyond 48 blocks	ON
Simplify Distant Chiseled Blocks	Render far chiseled blocks as solid cubes	ON
Smart Chunk Culling	Scale the occlusion-culling chunk threshold with view distance	ON
Reuse Light Scans	Reuse the previous frame's dynamic-light scan while standing still	ON
Batch Entity Light Reads	Group visible entity light samples by chunk	ON
Cache Entity Shader State	Share view/water uniforms and the animation buffer lookup per pass	ON

Sliders

Setting	Range	Default	Unit
Shadow Distance	20-200	80	blocks
Collision Distance	16-128	64	blocks
Chisel LOD Distance	32-256	48	blocks

Dropdowns

Setting	Options	Default
Render Scale (FSR)	Native (1.0x), Quality (0.85x), Balanced (0.77x), Performance (0.67x)	Native

FSR 1.0 Upscaling

Below Native, Optimum renders the world at the selected scale and runs the AMD FidelityFX Super Resolution 1.0 pipeline:

• EASU (Edge-Adaptive Spatial Upsampling): upscales the lower-resolution framebuffer to native resolution
• RCAS (Robust Contrast-Adaptive Sharpening): applies contrast-adaptive sharpening

Lower scales give more FPS at the cost of some softness. Changing the setting rebuilds the framebuffers and reloads shaders immediately — no restart. Native bypasses FSR entirely with no overhead, and produces output identical to vanilla.

Non-Configurable Optimizations

These run unconditionally because they produce identical output with zero tradeoff:

• Ambient sound position gate (skip when stationary)
• Fly sound volume deduplication (skip below 1% delta)
• BlockPos reuse in particle ticks
• Animation check reorder (distance before frustum)
• Name-tag frustum reuse (IsRendered flag)
• Entity render distance pre-cull
• Lock contention reduction (System.Threading.Lock)
• Chunk upload scratch buffer reuse
• Chunk sort skip (only re-sort when player moves)
• SVG asset reload (prevents mod icon loss)
• Mouse wheel fix (#9710)
• Creative search cache crash containment
• Shader optimizations (godrays cap, shadow alpha threshold, cloud march reduction, foam grid)

Diagnostics

Run .optimum status in the chat to see the current value of every toggle, plus per-optimization hit/skip counters. Run .optimum reset to zero all counters.

Additional commands:

• .optimum chisel lodstats — Show chisel LOD hit/miss per chunk
• .optimum chisel lodreset — Reset chisel LOD counters

Persistence

Settings persist to .optimum/optimum.json in your VS data path. Each toggle, slider and dropdown writes on change. Removing Optimum and reverting to vanilla ignores this file.

Config-file-only settings

A few options have no Extra-tab control and are edited directly in .optimum/optimum.json:

Key	Default	What it does
MapPageCache	true	Enable the map page cache
MapPageCacheMaxLayers	128	GPU texture-array layers (clamped 16-512)
MapPageCacheBc7	true	Use BC7 compression when the GPU supports it
MapPageCachePregen	false	Fill unexplored map chunks with approximated terrain