Voxels Chunk (version 2)

IDs and states are separated for extRLE16 compression efficiency.

File format BNF (RFC 5234):

chunk    = (65536*uint16)  block ids
           (65536*uint16)  block states

uint16   = 2byte           16 bit little-endian unsigned integer
byte     = %x00-FF         8 bit unsigned integer

65536 is number of voxels per chunk (16*256*16)

Block state

Block state is encoded in 16 bits:

0-2 bits (3) - block rotation index
3-5 bits (3) - segment block bits
6-7 bits (2) - reserved
8-15 bits (8) - user bits

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Voxels Chunk (version 2)

Block state

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