block.extra
Syntax
Get/set the value of the block extra variable at index 1. Use the optional argument i to affect the value of an extra variable at a different index.
a - value stored in extra variable slot i for block blp
a - value to store in extra variable slot for block blp
blp - block pointer i - (optional) extra variable index. If not provided, index 1 is assumed.
block.excavated
block.facelist
9.1.13