Passage block is for large ships and stations. This was formerly the ladder block. It currently serves no function beyond aesthetics. But you can make something similar to a so-called Jeffrey's Tube using it, some narrow maintenence tunnel.
The block can be placed on any surface permitting except for the bottom. It can be used to create interesting decorative designs. The block is placed and used as hallways or shafts going up or down.
- The only way to light these things is to place an adjacent light source on the front, back, or bottom. Otherwise it's quite dark inside the block.
- It contains glowing lights inside of it, however they currently do not light the ground and block itself. They're merely just decorative.