Cancel Block Update
by phoupraw
Cancel Block Update lets server owners turn off block updates, scheduled ticks and placement checks through game rules and commands, for building and testing.
What it does
Control covers four systems: neighbor block updates, scheduled block ticks, random ticks and fluid schedules. Each can be stopped on its own, so a world can run with some of them disabled while others keep working. Placement validation can also be lifted, which makes unlimited block placement possible. Each of these is handled through a game rule or a cancelblockupdate command rather than a menu, and the rules can be changed while a world is running.
Typical use is building special structures or testing a map, where blocks should stay where they are put without reacting to their neighbors. A debug stick helps adapt block states during such work. The author warns that enabling the mod during world generation can produce many floating blocks, so the game rules should be returned to normal before a world is generated for regular play.
Cancel Block Update requires Fabric API and runs on Fabric. It is server required and client optional: the server must run it, while players may add it for the client side. The mod is released under the Mozilla Public License 2.0 and is open source, with files for 1.19 – 1.21.1.
Key features
Block update control
Block updates can be cancelled with cancelblockupdate:no block update, stopping neighbor reactions to placed blocks.
Schedule and tick control
Block schedule ticks, random ticks and fluid schedule ticks can each be turned off with their own rule.
Unlimited placement
The place limit and replace checks can be disabled, so any number of blocks can be placed in one spot.
Game rule toggles
All behavior is set through game rules in the built-in data pack, which can be changed in a running world.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x2 of 2 versions with builds
1.20.x2 of 2 versions with builds
1.19.x5 of 5 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Special building
Builders can place blocks that stay in their exact states, which suits structures that would otherwise collapse or change.
Map testing
Map makers can build and check test areas with the block update systems switched off, then restore the normal rules.
Who it’s for: Map makers, builders and server owners who test structures. Players who want normal survival behavior do not need it, and the game rules should be reset before regular play.
Questions
Does Cancel Block Update need Fabric API?
Does every player need to install Cancel Block Update?
Can the behavior be changed in a running world?
In the catalog
Cancel Block Update is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from phoupraw
Similar mods
What the author says
[Warning] During world generation enable this mod might produce lots of floating blocks, if want to generate normal world, please change game rule in advance. Cancel block update, block schedule tick, random tick and fluid schedule tick, allow unlimited place block.
Official listing
- Modrinth page
- modrinth.com/mod/cancel-block-update
- Owner
- phoupraw
- Published
- 2023-06-15
- Updated on Modrinth
- 2025-07-05
- Facts verified
- 2026-10-15