One of the lead engineers on Valve’s experiments with virtual reality, Atman Binstock, has left to join Oculus VR as its chief architect.

Binstock will lead a new research and development team based in the Seattle area.

He had been recruited to Valve by Michael Abrash, the VR guru credited with helping Oculus take a big technological step forward last year at a crucial time, before it raised a $75 million round from Andreessen Horowitz. Binstock created an acclaimed “VR Room” for a virtual reality developer gathering at Valve earlier this year.

In a blog post announcing Binstock’s hiring, Oculus also noted that it’s “ramping down production” of the original developer prototypes of its Oculus Rift headsets, due to a hardware component shortage. However, it’s not immediately clear whether that means it will then start ramping up new developer kits based on its more recent prototypes, or if a more consumer-minded announcement is ahead.

The company plans to share more details at the Game Developers Conference in San Francisco next week.