I'm trying to do a little sleuthing here. Rio Carnival occurs at night, so these pics below can't be from there. I think they are from San Francisco, and appear to be from a sort of copy cat event. These were posted at photofile (user elcoyote if you want to see the pics) and titled with the Russian term for carnival.
If you wear a tapisexo, but then paint over it while you're painting the rest of the body, you can look pretty naked overall..
I'd be interested to know more about this event..
thanks,
Klondike