Minecraft Snapshot 12w07b
As announced yesterday, Snapshot 12w07b has been released a day early. Among other things, this snapshot includes the addition of a new light source as well as multiple changes to AI and a new file format for Minecraft worlds. Mojang's official blog post for this snapshot can be found here.
The list of changes for this snapshot includes:
- Added new world file format called “Anvil” (256 max height and 4096 block IDs** See note below).
- Multi-player light calculations do no longer cause affected blocks to be transmitted to the clients, instead the clients will recalculate the light on their own.
- Villagers will repopulate villages based on how many houses there are available. AI programmer Jon explains what a "house" is here.
- Some nights in villages will be worse than others… There's word of zombie sieges on minecraftforum.net.
- Added a redstone-controlled light source. Info on the new redstone lamp can be found here.
- Decreased chance for the rare mob drops.
- All animals use the new AI system now.
** The game can’t use the full range of IDs yet because there are still some assumptions that IDs above 256 are items. **
- Multi-player light calculations do no longer cause affected blocks to be transmitted to the clients, instead the clients will recalculate the light on their own.
- Villagers will repopulate villages based on how many houses there are available. AI programmer Jon explains what a "house" is here.
- Some nights in villages will be worse than others… There's word of zombie sieges on minecraftforum.net.
- Added a redstone-controlled light source. Info on the new redstone lamp can be found here.
- Decreased chance for the rare mob drops.
- All animals use the new AI system now.
** The game can’t use the full range of IDs yet because there are still some assumptions that IDs above 256 are items. **
Downloads:
- Client: http://assets.minecraft.net/12w07b/minecraft.jar
- Server: http://assets.minecraft.net/12w07b/minecraft_server.jar
In order to use the new snapshot, you will have to locate your Minecraft bin folder, and manually replace the minecraft.jar file (or the appropriate server files if you are running a server).

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