There's a programmer who goes by the name "Yoshi" who has a system he put together for under $2000 and has samples on his site that look pretty darned good to me. http://www.geocities.com/mocap_is_fun/ The system uses Optitrack cameras (http://www.naturalpoint.com/optitrack/) which are cheap enough for the serious hobbyist, but Optritrack doesn't provide a software interface so you can use them (duh?), so you'd have to write your own software. Yoshi has been doing just this, and his samples look very encouraging, but he has not released his software interface, and his progress seems sporadic. Personally, I'd kill for an affordable mocap solution (okay, maybe an animated kill) and, seeing the next cheapest solution I've seen out there runs about $30,000, I'd think Yoshi's system/softare would be very popular. Perhaps if we all email him, we could encourage him to work on it... email Yoshi at: mocap_is_fun@yahoo.com --Tim http://www.auroratrek.com