A transparent lane is a path through a signal-producing circuit that can be used to merge signal streams. The signal is usually a standard spaceship such as a glider. It can either be produced by the circuit, or it can come from elsewhere, passing safely through on the same lane without interacting with the circuit. A good example is the NW31 converter, which has two glider outputs on transparent lanes, as shown below.
| (click above to open LifeViewer)|
RLE: here Plaintext: here