The Long Island Business News has a feature on Perspectives Studio of Glen Cove, New York.
Described as "the largest 'motion capture' studio on the East Coast," Perspectives did the mocaps for Grand Theft Auto IV:
If you don’t know what motion capture, or “mocap,” is, then think of the Grand Theft Auto video game series, said Nelson, studio supervisor for Perspectives. The eerily lifelike movements in the phenomenally successful games... were shot at the Glen Cove studios.
The mocap process begins with actors and stunt people rehearsing scenes... including highly choreographed fights with guns, knives, whips and other objects... The real people are then dressed head to toe in what looks like Velcro wetsuits where silver markers, about the size of gumballs, are stuck to 53 locations on the suits...
40 cameras set along the studio walls at various heights record the action, picking up points of light from the markers attached to the suits. The movements are then mapped onto a digitized 3-D model, and a skeleton of every character and object in motion is created. Later physical features, clothes and backgrounds are filled in to create animated sequences.
Since Perspectives has an exclusive relationship with Rockstar for GTA games, naturally we can't help but wonder whether the infamous Hot Coffee scenes were shot there...?
“We’ve done sex. Simulated, of course.”