Mod Structure Gel API

Structure Gel API, easier generated structures

Structure Gel API is a library mod for Minecraft Java Edition, compatible with Forge and NeoForge. It helps developers create and manage generated structures, especially those built with Minecraft’s jigsaw system. Its open source, documented API provides tools and extension points for structure templates, data driven blocks, entities, rotation, mirroring, and placement logic, making custom world generation easier to develop and maintain.

For builders, the mod adds visible gel blocks that become air inside generated structures while preventing natural terrain from filling their interiors. A creative Building Tool supports large scale edits, selections, undo, and redo. On a modded Minecraft server, it mainly supports other content mods. At BoxToPlay, this dependency fits naturally into curated modded gameplay.