Warp Door is one of the doors added by Dimensional Doors.
Crafting[]
There are three methods to crafting the Warp Door. The first is the most expensive method, using up an entire Ender Pearl for one door. The alternative takes a bit more time and effort, using Stable Fabric instead. The third, however, actually uses nothing but a single wooden door and a pre-generated rift in the world. Putting a door on the same block as the Rift will turn it into a door to that Pocket Dimension. The same works for Iron Doors.
Usage[]
Warp Doors have two main uses. Each Pocket Dimension is a certain number of steps away from the Overworld. Traveling through a Warp Door will take you one step closer to the Overworld.
A Warp Door used in the Overworld can be used for teleportation. Use a Rift Signature to mark the two places where you want the doors, then place a Warp Door over one of them. Going through the Warp Door should instantly transport you to the other location.
Technical Block[]
Warp Door is also the name for a technical block for Warp Doors added by the same mod. They are only used when a Warp Door is placed and acts as the top half of the placed door.