I am undecided on this one.
The contrails sometimes are the only visible sign of another spacecraft passing nearby.
Spacecraft do not leave long lit contrails in normal flight in any sci fi depiction I can think of. They are sometimes used to highlight a ship jumping to FTL.
I really like the contrail effect on the ships in The Expanse, their Epstein drives. They are more of a rocket drive so perhaps just the glow at the contrail emitter for gravity drives.
The contrails sometimes are the only visible sign of another spacecraft passing nearby.
Spacecraft do not leave long lit contrails in normal flight in any sci fi depiction I can think of. They are sometimes used to highlight a ship jumping to FTL.
I really like the contrail effect on the ships in The Expanse, their Epstein drives. They are more of a rocket drive so perhaps just the glow at the contrail emitter for gravity drives.