I understand that other discussions about relativity (generally special relativity) being added to the game for more realism in high speed interstellar travel, that being the addition of time delays between different spacecraft moving at higher speeds, or even more recently about a relativistic doppler effect. I can understand from a game development standpoint they seem like they would be quite difficult to add to the game, however, there are other aspects of special relativity that could be added that I think could be quite interesting.
For example, as I previously mentioned, relativistic doppler effect (i.e. redshift/blueshift) could make stars in the front of the spacecraft's moving direction appear more blue and those behind appear redder. There is also a really interesting aspect of high speed travel in relativistic aberration, in that the angle of stars in the sky appear to converge at higher speeds, effectively changing the view of the sky. Think of approaching hyperspace in Star Wars, where the stars seem to stretch out as they go forwards, only in reality the stars would appear closer together in the direction you are moving and further apart behind you. I think that this could be a really interesting consideration to add to the game, and one that seems a lot less challenging than having different 'clocks' on each spacecraft.
These effects would only be noticeable at the really high speeds, and perhaps not necessary to add to the game depending on the gameplay of interstellar travel, but still an interesting suggestion I think. I realise that someone else could have also mentioned this previously, but it occurred to me recently how interesting it would be to see in this game.
