Sands in IXE, depending on their type, adhere to a few types of simulation.

Rock sands are static and do not move. Example: Land or Rock.

Sands with this simulation type will fall down if there is empty space directly underneath, or if the cell directly to the left or right of the cell underneath is empty. If those criteria are not met, the sand will settle.

Example: Sand or Stone.

Liquid sands, in addition to being able to move down and diagonally like the Sand simulation, will also travel horizontally (to the left or right) if not blocked by other sands.

Example: Water, Lava, Pixelium.

Gas sands are equivalent to Liquid sands, but in reverse. They will move up, diagonally up, or horizontally.

Walker sands will move in entirely random directions that aren't occupied by other sands.

Stacker sands can only move directly downwards.