Octachisel
by BlackCube4
Octachisel lets a chisel carve a block into eighths, so a single block can be shaped into slabs, stairs and other partial forms on a 2x2x2 grid.
What it does
Octachisel is a NeoForge decoration mod for Minecraft 1.21.1. A chisel carves a full block into eighths, and the pieces can then be placed or mixed freely, including with modded blocks. Partial forms such as slabs and stairs fit the 2x2x2 grid, so a single block can hold several shapes at once. Every player and the server need a copy of the mod. Octachisel is released under the GNU General Public License v3.0 or later and is open source, with its source code published.
Key features
Eighth-block carving
A chisel carves a full block into eighths, and each eighth can be placed on its own.
Mixed eighths
Eighths of different blocks can be combined in one shape, including blocks from other mods.
Shaped 2x2x2 grid
Slabs, stairs and other forms are cut from the same 2x2x2 grid, so they fit together.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Does Octachisel need to be installed on the server?
Does Octachisel work with shaders?
In the catalog
Octachisel is one of 12,078 Decoration mods on ModsFinder, and one of 5,201 Decoration mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
Carve any full block into eighths with the chisel, modded blocks included, then place and mix those eighths freely. Build vertical slabs, stairs, and anything else that fits a 2x2x2 grid, out of any block you can hold. Shaders: chiselled blocks report the material they are made of, so block-ID driven shader effects…
Official listing
- Modrinth page
- modrinth.com/mod/octachisel
- Owner
- BlackCube4
- Published
- 2026-07-31
- Updated on Modrinth
- 2026-08-21
- Facts verified
- 2026-10-15