Sign/DV

Standing

Bits	Description
0x1 0x2 0x4 0x8	A four-bit field storing a value from 0 to 15 specifying the block's orientation: 0: south 1: south-southwest 2: southwest 3: west-southwest 4: west 5: west-northwest 6: northwest 7: north-northwest 8: north 9: north-northeast 10: northeast 11: east-northeast 12: east 13: east-southeast 14: southeast 15: south-southeast

Wall

Bits	Description
0x1 0x2 0x4	A three-bit field storing a value from 2 to 5 specifying the block's orientation: 2: north 3: south 4: west 5: east
0x8	(unused)