(The preceeding post by Tortanick was originally posted on my Recent Additions thread in reply to this post
, but was moved here)
How will the client know weather colonies are advanced enough to generate supply lines, and weather other players have researched techs that extend the number of jumps in a supply line?
If a player has good enough visibility of another player's planet, the first player will know the supply and construction meters' values. These determine the fleet supply and resource supply ranges, respectively. The specific techs or other effects that caused these meters to be what they are might not be known, but they don't need to be to know how far the supply lines extend.
I imagine we'll make construction / infrastructure level quite easy to see on a planet, so it should be fairly easy to see how far enemy empires can send resources, if you've seen their planets at all. Since fleet supply range should also be fairly easy to see, we'd probably want to make planets' supply meters easy to see see as well.
(For now, seeing a planet gives you full information about all its meter values.)