Minecraft 1.21.11
Loader Fabric
Client-side only
No packet injection

HumanBuilder

An autonomous Litematica schematic builder that places blocks like a real player — natural aim, human timing, lag-aware — so you can estimate how long a build actually takes.

Latest build: resolving… · always the newest jar · pair with the mods below

# What it does

🎯

Natural aim

Fitts's-law timing, quintic Bézier smoothing, dual-sine micro-tremor, overshoot-and-correct, and mouse-sensitivity quantization.

🎲

Human timing

Box–Muller Gaussian click delays, gradual fatigue that slows you down over time, plus occasional hesitation and misclicks.

📉

Lag-aware

Measures live TPS and scales every delay by 20 ⁄ TPS — and fully pauses when the server can't keep up, then resumes.

🧱

Correct placement

Validates every block against vanilla's own placement logic — slabs, stairs, pillars and directional blocks land right.

📐

Litematica bridge

Reads your placed schematic, builds bottom-up nearest-first, and only places blocks you actually have in your inventory.

⏱️

Build-time estimate

Live readout of blocks placed, blocks/min, seconds/block, TPS and fatigue — the whole point of the tool.

# Requirements

Install these Fabric mods for Minecraft 1.21.11 alongside HumanBuilder:

Fabric API
Litematica (sakura-ryoko 0.26.11+)
malilib
Cloth Config (optional)
Mod Menu (optional)

# Setup

  1. Download the humanbuilder jar with the green button above.
  2. Drop it into your .minecraft/mods folder, together with Fabric API, Litematica and malilib.
  3. Launch Minecraft 1.21.11 with the Fabric loader profile.
  4. Load a schematic in Litematica and place it where you want to build.
  5. Stand within ~4 blocks, with the needed blocks in your inventory, and press B to toggle.
  6. Read the action-bar: placed · N/min · s/block · TPS · fatigue — that's your estimate.
Made for personal use. HumanBuilder is built for singleplayer and your own server, to estimate manual build time. It's client-side and never fabricates packets — it only drives the same key/mouse inputs you would. There's no anti-cheat to defeat in those worlds; the human-like imperfection exists to make the time estimate realistic (and recordings look natural).