Transparent lane

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.

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The optional third output shown in the NW31 article is non-transparent, because the upper eater 1 catalyst would get in the way of a passing glider on the same lane.

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