Modding:Chunk Data Storage

A chunk is a 32x32x32 cube of blocks. Each chunk contains the following information:

• Every block in the solid layer
• Every block in the fluid layer
• Sparse map of block positions to block entities
• List of entities
• Sparse map of decor blocks. The map is indexed by both the block position and decor index. The decor index includes which face of the parent block the decor is attached to, and optionally a location on a 16x16 grid on that block face (used by caveart).
• Map of modid to a byte array of custom moddata
• Format version metadata