Here’s a neat video that the folks from Project Holodeck pointed out on their blog. Cara Santa Maria of the Huffington Post took a trip to the MxR (Mixed Reality) Lab at USC. Mark Bolas, the associate director for mixed reality research and development at ICT, walks Maria down a gravel path in virtual reality which seems to go on forever, even though they’ve only got a 20×20 foot space. How do they do it? Take a look: