Merging

Merging aka forming multiblocks is when a block that is larger than a regular block is formed by placing 2 or more (with the highest merge level setting) of the same Material together. When done, it forms one block that doubles or quadruples their materials' health respectively depending on how many blocks are merged, and smooths out the texture. However, if the player wants a smaller multiblock, the way to do it is delete it and start over, or use the Scaling Tool. This means that the merged block will shrink when the health reaches closer to zero. Green Merging is suited for larger boats, as it reduces the actual amount of shapes (4 blocks is more shapes than 1 big block). This helps the game server as it reduces the amount of physics lag.

Merging Levels
In the 5/20/2018 update, merging levels were introduced. The default Merge setting is yellow. Old Boats may have a bug of cracked blocks. This can be fixed.
 *  Merging level one (red)  disallows new blocks to form merged blocks, but will leave already merged blocks alone.
 *  Merging level two (yellow)  only allows 1x2 merged blocks.
 *  Merging level three (green)  allows an infinite amount of blocks merged such as a 3x4, 5x6, 13x16x3 and higher.

Trivia

 * The old merging level allowed 2x2 blocks.
 * Building a creation on a different team from where it was built on the last session may not merge with each other.
 * Merging balloons together with Merging level three allows you to make larger balloons. The same applies to the Parachute Block.
 * Multiblocks can also be created using the Scaling Tool.