Fork of Recurrent Complex by Ivorius: https://www.curseforge.com/minecraft/mc-mods/recurrent-complex

One of Minecraft's most advanced and complete structure-generation mods: ruins, dungeons, trees, villages, mazes, decorations, natural terrain blending, and an extensive custom structure file ecosystem.

Community Structure Repository: https://discord.gg/jY7RHksKzd

1.20.1 Forge (v.0.3.0.0)

Brings classic Recurrent Complex structures and worldgen to Minecraft 1.20.1 Forge.
Supports old RC .rcst structure files, with modern block conversion and safe missing-mod fallback.
Includes natural structures, Nether structures, villages, decorations, saplings, mazes, ruins, terrain blending, and script-generation support.
Adds /rc gui for browsing, previewing, placing, exporting, editing, and repairing structures in game.
Includes structure authoring tools: selection items, schematic import/export, generation presets, transformer presets, biome/dimension rules, script marker authoring, and missing-block repair.
Built for modpacks: compatibility audits, missing-block reports, clear diagnostics, safe missing-content handling, configurable worldgen frequency/spacing, and vanilla /locate support for RC natural structures.
Known limitations: the full old RC editor GUI, exact 1.12.2 transformer/expression parity, true modern jigsaw-pool village integration, and some advanced legacy systems are still in progress.

Wiki: https://github.com/Akiak7/RecurrentComplexVolts1.20.1

1.12.2 Forge (v.2.0.0.5)

This version is intended as a drop-in replacement for the original Recurrent Complex 1.12.2 mod.

Fixed command compatibility with Java 24+
Fixed severe lag caused by structures referencing blocks from uninstalled mods
Improved performance through various changes and optimizations
Improved structure placement logic, especially on rough terrain and water (configurable)*
Fixed bug where structures would sometimes spawn one block lower, particularly on water
Fixed bug where structures occasionally spawn in the sky
Fixed custom chest tile entity data being lost when using replace transformers
Raised the editor/save size limit for large structures and loot tables
Added simple biome/dimension whitelist and blocklist options in config
Added simple biome/dimension ID/type controls in the structure generation GUI
Added /#structures locate <structure-id> for finding predicted RC structure locations.

*rayAverageMaxHeightSpread is the new config option, which improves/filters placement on rough terrain. This will also reduce structure frequency slightly. Increase value to soften effect, set to 0 to disable completely (reverting to original RC behavior).

Wiki: https://github.com/NoMoreUsernames999/Recurrent-Complex-Wiki/wiki

Note for 1.12: it is highly recommended to disable the RLTweaks patches for Recurrent Complex, as they conflict with this mod's code and are unnecessary.

Recurrent Complex Volts