How to make a double door?

Solution 1:

I found a solution with command blocks:

What the numbers are:

1. /testforblock ~ ~+3 ~ minecraft:door C
2. /testforblock ~ ~+3 ~ minecraft:door C
3. /setblock XR YR ZR minecraft:wooden_door O
4. /setblock XL YL ZL minecraft:wooden_door O
5. /setblock XR YR ZR minecraft:wooden_door C
6. /setblock XL YL ZL minecraft:wooden_door C

And what the letters are:

• XR, YR, ZR are the coordinates of the Right door
• XL, YL, ZL are the coordinates of the Left door

• O and C are the door state numbers. O stands for open, C for closed. Instead of these two numbers, use:

  • O = 4, C = 0 when the doors are facing east (positive X)
  • O = 5, C = 1 when the doors are facing south (positive Z)
  • O = 6, C = 2 when the doors are facing west (negative X)
  • O = 7, C = 3 when the doors are facing north (negative Z)

You can tell which way the door is facing by pressing F3 and pointing at it:

Note in the screenshot that you are looking west, too, even though the door is on the closer side of the block to you.