|Custom Stuff 1
Information presented below this line is outdated syntax or information used for Custom Stuff 1. It will not work with Custom Stuff 2.
The id2 attribute is an attribute exclusively tied to liquid-type blocks. The id2 attribute is necessary for liquid-type blocks (and only liquid-type blocks) because each liquid takes up two block IDs: one for the still liquid and one for the flowing liquid. This attribute is very similar to the id attribute in that it assigns a block ID, but this attribute only defines it for the flowing blocks.
To define an id2 value for a fluid block, add the following line to the .block file:
Where the ### is the block ID you want to use.