Make magazine recently travelled to Valve's headquarters in Washington to check out the game company's VR efforts, and they brought some cameras with them.
Now Make has published a photo-filled feature about the trip on its website, and part of that feature is a 15+ minute video (embedded above) of various VR prototypes inside Valve's VR lab.
It's an intriguing (if very guided) look inside the workshop of one of the game industry's high-profile bastions of VR research, and it includes a conversation with Valve VR engineers Monty Goodson and Alan Yates.
Yates, of course, recently estimated that as much as a third of Valve is now working on VR/AR in some capacity. That's reinforced by the fact that Valve has revived its Steam Dev Days event this year with a new focus on VR.