Underlay

Important Breaking Change

Overlays are now correctly stored per-dimension. After updating:

• If you only used Underlay in the Overworld, nothing changes, you're good to go!
• If you placed overlays in other dimensions (Nether, End, etc.), the old save file (underlays.dat) will be treated as if it belonged to the Overworld. You’ll need to:

1. Load your world and remove any Nether/End overlays while in the Overworld.
2. Travel back to those dimensions and re-place them there.

Other notable changes:

• Exclude tags actually work now
• Fixed overlays disappearing after changing dimensions (#8)
• Fixed rendering issues on Neo/Forge
• Added support for 1.21.6