New feature idea: ships on the main map leave behind faint "stains" or colored contrails. The effect is cumulative, so that heavy traffic moving from one planet to another leaves a brighter, heavier stain. Stains fade over time, so that they reflect relatively recent history.
The result is certainly pretty, but also communicates the following useful information:
- displays a "heatmap" of kinds of activity are occurring in between planets, indicating their relations (obviously valuable stuff): piracy migration, warships, trade, immigration, disease, diplomatic overtures, etc.
- visually indicates recent ship movement if you didn't immediately catch it
- visually indicates a planet population's recent memory of an attack or diplomatic overture by another planet
- this information is viewable immediately on the main screen, without going to an interstitial screen (but should be able to toggle off, or available only from holding a key down)
Issues:
- overlapping trails can cause just useless strands of white, so you may need to separate the trails into "lanes," resulting in broad rainbows leaping from planet to planet
- no doubt this is complicated to pull off
- likely to be difficult to immediately understand (but what isn't)