DucIsHere/Project-3 — reverse-engineered prompt

Build me a Java prototype for a Minecraft 1.20.1 style terrain generation project. I want it to take datapack JSON ideas and turn them into usable Java code, then use that to generate interesting voxel terrain with height changes, erosion inspired shaping, and a simple horizon or voxel shader experiment.

Please make the project actually runnable from Gradle, clean up the messy structure, and organize the terrain calculator, JSON to Java converter, native core ideas, and shader files so it’s understandable. I don’t need a polished game, I want a working foundation where I can run a demo or test command and see terrain data being generated, saved, or printed in a useful way.

Keep it simple enough that I can keep experimenting later. Add comments where the terrain and erosion logic happens, and include basic instructions for how to build and run it. Look up current Minecraft 1.20.1 or Java Gradle docs online if you need to.