So can you do the raven in a short sleeve shirt where the sleeves cut-off a little above your elbow? Also if your wearing a long sleeve shirt, does the end of the sleeve (at the wrist) have to be loose or can it be quite tight. I would assume it would have to be decently loose.
Sleeves, be they short, long, halfway up your elbow, buttoned, loose or held together with paperclips, play no part at all with Raven . Anything more than that would be close to exposure so, in the words of Porky Pig, 'Thhh That's all Folks!'