I'm sorry. My fault. I just like my hammock.
I did work on a 3 legged stool patterned off the Roll-A-Stool (TM)
but made out of carbon fiber and ripstop nylon that came in right at 5 oz. (sorry no pic of my creation available) But I alway had the uneasy feeling when sitting on it that it would collapse or worse fail and send splinters of CF into my rear, so I stopped using it and switched to carrying the GG NightLight pad Torso Length to sit on. Use it on logs, rocks, the ground, everywhere. waterproof, very comfy, 3.5 oz.
Not to beat a dead horse, but what about a miniature hammock seat. One just big enough for your rear. Tie to two trees and have a great seat. Could probably use spectra cord and cuben and have it weight only an ounce or two. Would be nice around camp. Just a thought.