Extra Worlds

A resource dimension mod built for heavily modded servers: spin up safe, disposable mining worlds without ever touching your real Overworld.

Why you'd want this

Keep your real world pristine. Every server eventually turns into a moonscape of strip mined hillsides and abandoned quarries right around spawn. Give players a dedicated, disposable place to dig, grind, and strip resources, so the actual world everyone lives in, builds in, and explores stays worth exploring.

Reduce landscape disputes. No more "who dug this crater next to my base" arguments. Resource worlds are separate, resettable, and understood by everyone to be temporary.

Keep resources fresh without world resets. Instead of periodically wiping your entire server (or manually managing one shared mining world), give players an actual system: reset on a schedule, reset on demand, or leave it permanent, your call, per resource world.

Get real variety, not just "another copy." Want a straightforward mining world? An extreme terrain challenge zone? A cave focused dimension? A dedicated flat creative/testing space? All of these are real, distinct generation types, not reskins of the same thing.

What makes this different from other resource world mods

Most existing resource/mining dimension mods share one fundamental flaw: they build their dimension by reusing your world's literal dimension type. If your pack runs any biome merging mod (TerraBlender, Biolith, and similar), that mod sees two dimensions claiming to be the same Overworld and refuses to properly register the second one, causing broken terrain, memory leaks, and server hangs. This is a well known, common failure mode in the modded Minecraft space.

Worlds fixes this at the source. Every resource world gets a genuinely unique dimension identity, cloned with identical settings, but structurally distinct, so biome merging mods never see a conflict in the first place. No broken terrain, no duplicate dimension warnings, no memory leaks from misregistered dimensions.

On top of that:

• Six real generation types, not just "copy the source": exact clone, flat (any registered preset, vanilla's own Tunnelers' Dream is a genuinely good stone heavy mining preset), amplified, large biomes, caves, and floating islands, all while keeping your pack's real biomes and mods intact underneath.
• Automatic safe spawn placement. Every teleport finds real solid ground first. No spawning inside a mountain in an amplified world.
• Config-file-driven profiles. Each resource world "type" is its own simple file. Add, remove, or tweak options without touching a line of code.
• Scheduled auto reset with a warning. Set a profile to reset every N hours, and players get a heads-up before it happens. Never an ambush.
• Genuinely clean deletion. Deleting a resource world actually removes its files from disk. It doesn't just hide it while quietly keeping old data around to resurface later.
• Survives server restarts. Resource worlds you've created come back automatically on reboot, exactly as they were.
• Isolated performance impact. Resource world generation runs on its own dedicated thread pool, separate from your main world. Heavy mining activity doesn't compete with normal gameplay for CPU.
• Per-profile resource controls: capped view/simulation distance, a world border, and an ore drop multiplier, all independently configurable per profile.

Commands

Profile options

Each resource world "type" is defined in its own file. Available settings:

• source_dimension: which dimension to base this profile on (your Overworld, Nether, End, or any modded dimension)
• generation_type: clone_source, flat, amplified, large_biomes, caves, or floating_islands
• flat_preset: which flat world preset to use (only relevant when generation_type is flat)
• view_distance / simulation_distance: how many chunks load/tick around players in this resource world
• reset.trigger / reset.interval_hours: manual or scheduled automatic resets
• border.radius: how large this resource world's playable area is
• loot.ore_multiplier: scale ore/block drops up or down for this specific profile