Lego Lab — printable LEGO-compatible bricks

param lines become sliders, and the range on the line is the range on the slider. The Lab's two named guard rails (inner/shoulder, amplitude/strut_depth) are orb params — no brick declares them, so they never fire here. A brick's ranges come from its param lines and from the validators.

A brick you typed is scored exactly like one that shipped: both grid gates and the mesh gate read the geometry in front of them, so nothing on this page goes quiet in custom mode. If your script declares an orb rather than a brick, the panels say so instead of guessing.

The clutch fit rides in neither the link nor the .bkr. It describes your printer and spool, so whoever opens your link gets your brick and their own fit set — a link that quietly compensated for your machine's error would make their brick come out wrong in a way neither of you could see.

Runaway evaluations are stopped after a time budget (Stop appears sooner). Browsers differ on out-of-memory: some kill the worker, Safari may kill the tab — save your work with Download or Copy link.