I’m only assuming these pics were taken during filming. I’m not sure exactly where this plays in the movie, but I love the facial expressions on Alexandra’s Annabeth as she seems to be aiding Logan’s Percy during what looks like some king of game or sport. As for Brandon and his blue leotards, well, those will be replaced with his satyr legs on film, of course.
UPDATE: The brunette in the images is actually Leven Rambin, who plays Clarisse La Rue, daughter of Ares. I’m not quite sure if she’s wearing a wig or if her hair was dyed.