Can you cross pipes in SpaceChem?
Is there anyway to have one pipe go over or under another, so as to avoid having to make long round-a-bout journeys?
Solution 1:
Pipes can cross at right angles, just drag the path of one over others. They cannot turn while crossing over others though, so there must be a free space after the crossing.
In the below exaggerated mess, the bottom end, for example, cannot go to where the cursor is without some ripping up of the existing pipes.