MinecraftForge/MinecraftForge — pull request #105 by Chicken-Bones (2012-07-11 05:49:05+00:00)
Title: Allow Dimension Unloading

Made use of DimensionManager.spawnSettings to allow dimensions to be unloaded when all chunks have been unloaded. Also prevents spawn chunks being held on spawnable dimensions.

Currently to reduce lag with Mystcraft which can handle reloading the dimension. Suggest adding forge hooks for dimension request in the future.