Illegal Building
Some cursed Minecraft additions
Screenshots
About this Mod
Adds some cursed blocks to Minecraft.
Like cobblestone that's offset be half a block.
Sand that falls upside-down. Cactus / Sugarcane that grows upside-down.
And more to come. Feel free to suggest more cursed stuff.
For questions feel free to join my Discord.
Want to support us?
-Mrbysco
Available Versions
How to Install Illegal Building on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "Illegal Building". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2, 1.21.11, 1.21.8 (+17 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Illegal Building server crashes on startup – what to do?
Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1.2). You can switch loaders with one click in the panel.
Is Illegal Building compatible with forge and neoforge?
Illegal Building officially supports forge, neoforge for Minecraft 26.1.2, 1.21.11, 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Illegal Building – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Illegal Building consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Illegal Building with just one click on your server.