
Modrinth · Minecraft mod
Kleene Builds
A mod that helps with building.
Quick answer
Which Kleene Builds release should I use?
Kleene Builds 0.3.0 targets 1.21 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Kleene Builds required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Kleene Builds 0.3.0 need?
0.3.0. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Kleene Builds without breaking your instance.
Built for Kleene Builds 0.3.0. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 0.3.0. It targets 1.21 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 0.3.0. It opens that exact file at the source.
About this project
What does Kleene Builds add?
Kleene Builds
Kleene Builds is a Minecraft Java Fabric mod that helps builders make large-scale design changes without leaving the game.
You select the part of your build you want to work on and let Kleene Builds apply a controlled building operation to that area.
Kleene Builds is currently designed for singleplayer worlds.
The basic workflow
- Select an area by choosing two corners of your build.
- Open View Operations using the configured keybind.
- Choose an operation such as Glass Spawnproofer or Add Block Dithering.
- Adjust the options for that operation.
- Execute the operation and let Kleene Builds apply the changes to the selected area.
Both corner blocks are included in the selection, but you can remove them in the View Operations page.
The selection tool defaults to rotten flesh, but it can be changed from the Settings page.
Current features
To view pictures of what builds look like before and after these features have been applied, visit this page: Feature Images Page
Glass spawnproofer: Add stained glass where mobs could spawn, with colors chosen to suit the surface or set by you.
Support floating gravity blocks: Automatically add supports below sand, gravel, concrete powder, and other blocks that fall without support.
Add texture to plain surfaces: Scatter similar blocks across a wall, floor, or structure to create natural-looking variation.
Create block gradients: Blend between chosen materials to make smooth-looking color or material transitions.
Rotate builds: Turn a selected structure around different axes, including at angles beyond simple quarter-turns. Unusual rotations can change the shape of fine details.
Remove temporary corner blocks: Clear the blocks used to mark a selection.
Explore 3D models as Minecraft builds: Import a model, preview it, select the Minecraft blocks it may use, see a voxelized version, and export a schematic for a compatible tool.
Correct or revisit changes
Undo or redo changes made by Kleene Builds and review past actions in the Action Log.
You can customize the selection tool, keyboard shortcuts, and the options for individual building operations.
Kleene Builds is currently intended for singleplayer worlds. Keep backups of important worlds before making large changes.
Created by CSClub05.
Project description from Modrinth.
Pick your setup
Kleene Builds by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.5
1 loader build1.21.4
1 loader build1.21
1 loader build1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Kleene Builds versions and loaders
0.3.0
kleene-builds-mc1.21-0.3.0.jar
18 Oct 2026
0.3.0
kleene-builds-mc1.21.6-0.3.0.jar
18 Oct 2026
0.3.0
kleene-builds-mc1.21.5-0.3.0.jar
18 Oct 2026
0.3.0
kleene-builds-mc1.21.4-0.3.0.jar
18 Oct 2026
0.3.0
kleene-builds-mc1.20.1-0.3.0.jar
18 Oct 2026
0.2.0
kleene-builds-mc1.21.6-0.2.0.jar
12 Oct 2026
0.2.0
kleene-builds-mc1.21.5-0.2.0.jar
12 Oct 2026
0.2.0
kleene-builds-mc1.21.4-0.2.0.jar
12 Oct 2026
0.2.0
kleene-builds-mc1.20.1-0.2.0.jar
12 Oct 2026
0.1.0
kleene-builds-0.1.0.jar
24 Aug 2026
Looking for an older file? The official Modrinth project page is in Resources.