CobbleGen

CobbleGen changes what a cobblestone, stone or basalt generator produces. Each generator output can be customized, and a randomised block can be chosen from a list where every entry has its own weight. A modifier can add a challenge, such as a fluid interaction that makes a generator produce a different block when one fluid touches another. Dimension whitelists and blacklists and a Y-level limiter control where the changed generators work. Entries can refer to a whole mod or tag, using a mod id and tag id instead of a single block id.

The mod ships without a generated default config, so out of the box it generates nothing new. Its three config layers cover basic replacement of the vanilla output, advanced weighted generation, and custom modifiers, and a server owner needs to configure it to get its full use. The default setup can be adjusted to produce deepslate ores with bedrock underneath. Because the mod runs on the server, a single-player world or a server runs it alone, and the optional REI, EMI and JEI integration is installed on the client side.

Installation needs nothing beyond the loader itself. CobbleGen is published for Fabric, Forge, NeoForge and Quilt across 32 release versions, 1.16.5 – 26.2, and snapshot builds are published as well. Forge files stop at 1.20.1, and the author recommends migrating to NeoForge for 1.20.2 and newer. The code is open source under the GNU Lesser General Public License v3.0 only.