Imperial Culture
There is no singular culture that can be said to be the culture of the 3I.
As 3I presence in the area of charted space controlled by the 3I is limited to Starports, Imperial Nobles Fiefs, Imperial Naval and Scout Bases, and Imperial Research Stations, aside from Military culture, there is little or no Imperial culture off of Capital.
The various member worlds all have their own cultures, and their cultural influences can be experienced whenever you are within an area of the 3I within which they trade.
Most of the cultures of the member worlds in the 3I are derivative of either Valani culture, descended from one of the Nation States of old Earth, or a fusion of one or more of those influences.
But none of them, aside from Capital, can be said to be "Imperial" culture, and Capital only by presence of the Emperor.
There is no singular culture that can be said to be the culture of the 3I.
As 3I presence in the area of charted space controlled by the 3I is limited to Starports, Imperial Nobles Fiefs, Imperial Naval and Scout Bases, and Imperial Research Stations, aside from Military culture, there is little or no Imperial culture off of Capital.
The various member worlds all have their own cultures, and their cultural influences can be experienced whenever you are within an area of the 3I within which they trade.
Most of the cultures of the member worlds in the 3I are derivative of either Valani culture, descended from one of the Nation States of old Earth, or a fusion of one or more of those influences.
But none of them, aside from Capital, can be said to be "Imperial" culture, and Capital only by presence of the Emperor.