Using the 3D Viewing Monitor, users can also highlight positive and negative parallax within each image.

ENGADGET: Panasonic PT-AE8000U projector touts brighter, smoother 3D for king-of-the-hill home theaters

Obama can afford to produce positive and negative ads that could serve to soften his own image while hurting McCain's, Campaign Media Analysis Group's Evan Tracey, CNN's consultant on ad spending said.

CNN: Most believe McCain's attacks on Obama unfair, poll finds