> >Doing this with an HMD sounds like you are creating a headache generator. > > It really won't be bad at all if the displays have an appropriate (2 frame) > peristance. Pesistance isn't the only issue. You can get headaches if the virtual 3D scene does not update to head movement fast enough. Apparently even 60Hz is too slow for this. By splitting feilds of a frame he will only get 30Hz updates, and then only at half the full vertical resolution. ***************************************************************** Olin Lathrop, embedded systems consultant in Devens Massachusetts (978) 772-3129, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads