The multi block break menu can be used to configure the multi block break feature of a custom item. This feature makes it possible to destroy surrounding blocks whenever a player destroys a block using this custom item. (For instance destroying all blocks that are adjacent to the broken block.) This menu should look like this:

Shape and Size

The shape and size of the surrounding area in which the blocks will be broken. There are currently 2 possible shapes:

• Cube: the original broken block is considered as the center of a cube. All blocks within this cube will be broken.
  • When size = 1, only the original block will be broken.
  • When size = 2, a 3x3x3 cube will be excavated.
  • When size = 3, a 5x5x5 cube will be excavated.
  • When size = 4, a 7x7x7 cube will be excavated...
• Manhattan: breaks all blocks whose Manhattan distance to the original broken block is smaller than the size (specified by you). The Manhattan distance is (distance on x-axis) + (distance on y-axis) + (distance on z-axis).
  • When size = 1, only the original block will be broken.
  • When size = 2, all adjacent blocks will be broken as well.
  • When size = 3, all blocks that are adjacent to the adjacent blocks will be broken as well.
  • When size = 4, all blocks that are adjacent to those blocks will be broken as well...

Stack durability cost

This is only applicable to breakable custom tools. Consider the case when using the cube shape and size = 2. (So breaking a single block with this custom tool will cause up to 3x3x3 = 27 blocks to be broken.) When you keep this checked/enabled, this will cause the custom tool to loose up to 27 as much durability. When you uncheck/disable this, the custom tool will always loose the same amount of durability, no matter how many blocks are broken.