How would one go about changing minecraft so that it generated something else where it would generate stone? I've been poking around in the world-gen related classes for hours, and I can't seem to figure it out. Even telling me which class is responsible for generating the stone would be perfect. If someone could help me with this, that would be great.
This is defined in ChunkProviderGenerate.java by my observations. I went through the file for all mentions of stone (ctrl + f helps a lot here), and changed it to obsidian. Everything previously generated as stone was generated as obsidian.