AutoBuild
AutoBuild constructs structures for you automatically, placing blocks from your hotbar (or offhand) so you don't have to aim and click each one yourself. Pick a structure with the Mode setting and toggle the module on — it does the rest, then turns itself off once the build is finished.
In Portal mode it scans around you for the best spot to raise a nether portal, fills in the obsidian frame, and lights it with flint and steel. You'll need obsidian (and flint and steel) in your inventory; if either is missing, or there's no valid spot nearby, AutoBuild stops and tells you in chat. Platform mode instead lays a flat square of blocks beneath your feet — handy for bridging across gaps or covering a hole — using whichever block you allow through its filter. With DisableOnYChange on, it shuts off the moment your height changes so it won't keep placing once you've moved.
All the actual block placing — timing, rotations, reach, swing and how it interacts with your inventory — is handled by the shared Block Placer settings. If you want continuous bridging while you walk rather than fixed structures, see Scaffold.
Category: World Enabled by default: No
Settings
| Setting | Type | Default | Range | Description |
|---|---|---|---|---|
| Mode | Mode Selector | Portal | Portal, Platform | Which structure to build: a nether portal frame, or a flat platform beneath you. |
| Mode → [Platform] → DisableOnYChange | Toggle | true | — | Automatically turns the module off if your vertical position changes, so it stops once you've moved off the platform. |
| Mode → [Platform] → Filter | Choice | Whitelist | Whitelist, Blacklist | Whether the block list below is treated as the only blocks allowed (Whitelist) or the only blocks forbidden (Blacklist). |
| Mode → [Platform] → Blocks | Registry List | — | — | The blocks the filter applies to when choosing what to place for the platform. |
| Mode → [Platform] → Size | Integer | 3 | 1..6 | How far the platform extends out from your position, making it larger or smaller. |
| Placing | Setting Group | — | — | See Shared: Block Placer. |
Last updated: 2026-06-08 — Based on source code