Building your 3x3 piston door Once you've gathered your materials, it's time to build your 3x3 piston door by following these easy steps. Please make sure all single redstone dust are in a cross ...

A 3x3 piston door in Minecraft (Image via DatOneGuy/Minecraft Amino) In Minecraft , piston doors are redstone-operated machines that allow players to create, open, and close doorways at their leisure.