Icehead's recent completion of "Nude Planet: Kasha", and rlfj's launch of its companion piece "Immigration Assistance", stirred up vague memories of another series set on and around a planet where clothing was an option most people didn't exercise. Sadly, those memories failed to include the names of any individual stories, the name of the larger series, or the name of the author, and the category searches didn't return anything relevant. I do remember there was more emphasis on galactic politics than n either of the Lupina stories, and I think there was either a planet or a station with a name that used the same "Sigma [number]" scheme seen in Kasha's story. Any bells ringing out there?