Iris - Dimension Engine

Before updating Iris, it is always recommended to back up your world and its Iris data. To use the new features and structures, download the updated data packs. You can then create a new world, or expand your existing world with newly generated chunks.

Changes

• Added support for 1.21.1, 26.1.2, 26.2 and 26.3 for client and server side mods on Forge, NeoForge and Fabric.
• /iris replace swaps the Overworld, Nether, End or any modded dimensions to Iris.
  • The off variable reverts it.
  • This replaces the previous command /iris world takeover.
• /iris catalog lists worldgen content from your installed mods.
• /iris ingest mods builds an Iris pack that adopts mod biomes, ores, plants, trees and structures.
  • Use the excludeRegions=<regions> variable to keep biomes out of specific regions.
• Packs can reuse existing dimension types with borrowedDimensionType.
• /iris worlds, /iris info, and /iris seed show each world's own seed and chunk count.
• /locate biome is faster and finds the biomes you actually see in the world.
• World generation is faster across terrain, caves and rivers.

Fixes

• Creating worlds no longer freezes the server.
• Servers with multiple Iris dimensions load faster.
• On 1.21.1, turning a replaced dimension off now actually switches it back.
• /iris replace gives a clear message for dimensions it cannot replace, and lists your installed packs if the pack name is wrong.
• A broken configuration no longer gets silently overwritten with defaults.
• Pregen now finishes saving before it reports done.
• Iris's datapacks can no longer be overridden by world datapacks, and shared tag files now merge correctly.
• A worldgen catalog error no longer breaks server startup.
• /locate biome no longer throws an error in areas that were already generated.
• Chests no longer lose or duplicate loot when filling fails.
• Loot tables keep working after a /reload.
• Structure chests still get their loot when a structure search takes too long.
• Treasure maps point to the right spot.
• Copper chests now get loot.
• Loot previews in Studio work correctly.
• Fixed a version-detection issue caused by the new release names.
• Fixed terrain issues far from spawn.
• Fixed a rare freeze caused by extreme noise settings.

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