The Paint Terrain has Paintbrushes. If the player's boat touches a paintbrush, the current half of the water beneath them will change colour according to the colour of the paintbrush touched. If a player touches a Paintbrush they will go its respective colour, same with blocks.
The known colours that can appear on paintbrushes are red, orange, yellow, green, blue, and purple. Paintbrushes can deal very high damage to ships, and is known for destroying Diamond Plates, Concrete and Gold Blocks easily.