Simulates the world: While you're sleeping, the world continues as if you are standing idle the whole time. Crops and trees will grow, smelting continues, weather progresses, mobs are active (even mobs added by other mods), and dropped items decay. Also heals half a heart per 3 hours spent sleeping.
No sleep-triggered monster spawns: Monsters spawn normally and may still attack you in your sleep, but only if they can actually reach you. No more worrying if your bed is in an "unsafe" location. If you'd be safe while awake, you'll be safe while asleep.
Sleep/wake at any time: Sleep any time, day or night. Wake automatically at the next dawn/dusk or manually at any time. If you have a Clock item in your hand, you can choose when you wake from among 16 options throughout the day.
Control your spawn point: Before you sleep, you can choose whether or not sleeping will reset your spawn point.
Maximum compatibility: This mod doesn't add any new Block or Item IDs. It just changes the behavior of the native bed. It will not affect your save files, and it is compatible with most other mods.
Can take a rather long time to simulate, especially if you have a slow machine. This is likely why Mojang chose to implement sleep the way they did.
Does not work with mods that change the bed block.
As with many mods, it may be tricky to get Somnia working with HD textures, but it is possible.
FAQ Q: Why does the simulation take so long? A: The simulation is a lot of number-crunching, so if you have a slow processor or are running intensive processes in the background (like frapps), it's going to take longer. There are also some design choices made by Minecraft's developers that make it impossible for me to optimize. Minecraft's code mixes graphics with logic in several places, so the simulation performs some unnecessary graphics-related operations that can't be skipped.
