I would be happy to add. Enjoying this thread so hope it continues going strong.
The original Brazil carnaval/carnival party orgies (between 99 and 2007) were the best for having extras be part of the setup and fun. Buttman and others have done very good productions and the extras would usually include real dancers, local strippers, models, and pornstars. Some of them would wear masks to hide their identities but Buttman's productions were usually good at not putting the cameras to their faces so that they'd enjoy themselves without worrying.
My addition to this thread is Buttman's Rio Carnival Orgy 2 which is just wall to wall extras and dancers who make the whole video excellent. This one is the first scene. The only recognised actresses are Gabriela Muniz, Marcela Duarte, Tabitha (who doesn't much get involved but mostly dancing around), and Mayara Rodriguez. This suggests that most of the others are extras and those potentially checking out the porn scene.
Rio Carnival Orgy 2 - Scene 1
03:30 - one of the guys starts feeling up an extras booty
04:46 - girl in black underwear and red bra. Gets her ass eaten out by Nacho. I can't tell if she's a pornstar - I can't recognise her, and she doesn't f**k but she's mostly playing with herself throughout the video.
06:01 - Leopard print bikini. Now she's hot, but clearly an extra. Camera man absolutely loves her and throughout the video there are several attempts by the guys to get with her. On this occasion two guys get over excited with her and she pushes them away. One of them tries to pull her thong down and the camera cuts. Clearly not part of the script.
06:39 - blue mask girl and ebony with the jean skirt. Both gorgeous. I don't think they're actresses but look like extras. They get squeezed by the guys and blue mask has her cheeks spread for the camera.
07:20 - Ebony with jean skirt is dancing on the stage with guy. Another guy comes along and eats her ass. She's a little surprised by it.
09:30 - Purple top - clearly an extra. Starts kissing a guy with a mask and sees camera on her and stops.
10:05 - Ebony with jean skirt from earlier quietly blowing a guy. She's got a bit relaxed and enjoying herself.
10:40 - Her friend blue mask is also blowing a guy.
13:58 - Extra with black dress and silver dangling chains is kissing Nacho.
14:50 - Nacho sticks his P in a girls bikini string and she's surprised by it. The girls are mostly into Nacho. Other guy comes along and begins to fondle her breasts. Nacho sits down to, I assume, stick his face in her booty. Camera cuts. Not part of the script. Lol.
19:00 - masked girl giving BJ.
19:50 - Nacho starts caressing girl with a black bikini. At 20:15 he's got his face in her ass. You never see her face.
22:15 - Extra with silver dangling chains is giving a BJ.
25:08 - Extra with purple bikini is getting ass eaten.
33:48 - Back to leopard print bikini. She lets Nacho suck her titties - John Stagliani is loving it. Nacho gets to his knees to, assuming, eat her booty, but camera cuts out.
36:36 - Ebony with jean skirt now f***ing. Amazing stuff.
38:49 - Green top gets her titties licked.
43:17 - Blue shorts with pink finally takes her top off and gets her booty kissed by a guy. Camera cuts.
48:01 - Ebony with jean skirt getting eaten out.
What do you guys think. Do you recognise any of these extras as professional pornstars? If you enjoyed it, do say, I can do another one.