Oliver “Doc_Ok” Kreylos is a research scientist / computer scientist who develops virtual reality applications for scientific research, specifically immersive 3D visualizations for the department of geology at the W.M. Keck Center for Active Visualization in the Earth Sciences (KeckCAVES).

He is an active participant in the Oculus subreddit posting as “Doc_Ok” where he has been gathering a lot of attention for his innovative data visualizations as well as an array of Kinects to create a “pseudo-holographic” avatar within virtual reality.

Oliver has been making virtual apps since 1998  including the Virtual Reality User Interface (aka Vrui) for navigating and interacting with immersive 3D visualizations of scientific data. He has a wealth of knowledge about VR, and has been providing a lot of insightful commentary on his blog at Doc-Ok.org.



  • 0:00 Intro & enabling scientific VR visualization
  • 1:57 Remote collaboration with scientific collaboration
  • 4:49 Developing the Virtual Reality User Interface (Vrui) toolkit
  • 8:01 3D visualizations that are impossible in 2D
  • 10:37 Converting 2D CAT scan slices into full 3D medical visualizations
  • 14:12 Future of Kinect-enabled telepresence collaboration
  • 16:32 Hardware & software stack for setting up a calibrated Kinect-array for telepresence
  • 19:07 Speculation on hacking Kinect V2
  • 21:37 How Kinect VR avatars can provide a sense of presence
  • 24:12 The importance of implementing positional head tracking for presence
  • 25:32 Importance of using 6DOF Hydra & STEM controllers with Vrui & data visualization
  • 27:29 Importance of supporting VR input devices in a unified manner to avoid previous VR mistakes
  • 28:32 Prophetic feedback on the Oculus DK1 that has been integrated into DK2
  • 31:33 Find Oliver online at Doc-Ok.org, @okreylos & Doc_Ok on Reddit. Oliver’s future projects


Music: “Fatality” by Tigoolio

hive-schematicProfessor Eric Hodgson explores some of the psychological impacts of virtual reality when it comes to spatial perception & memory, and effects like change blindness. He also talks about how to walk in infinite VR spaces within limited physical spaces with a technique called redirected walking. Finally, he talks about insights from IEEE VR community on this consumer VR revolution, compares the split between the old VR community to the new VR community, 3D user interfaces, data visualizations, and some examples for how corporations and the military are using VR.

EricHodgson_2008Eric Hodgson is the director of the Smale Visualization Center & also works with the Armstrong Institute for Interactive Media Studies at the Miami University of Ohio. He runs the HIVE (huge immersive virtual environment), which is a gym-sized VR Lab. For more information on Eric, here’s some of his VR research publications.


  • 0:00 Intro
  • 1:04 Redirected Walking
  • 3:50 Factors that go into spatial perception & visual dominance
  • 5:26 Why was the HIVE lab built?
  • 8:10 How our spatial memory works
  • 10:49 Change blindness for changes that are out of the field of view
  • 12:12 Navigating geometrically impossible spaces & how we mentally fill in gaps
  • 13:29 Movement speeds in virtual environments – natural vs. VR movement speeds
  • 14:38 Why VR movement speeds are 2x normal walking speeds. Field-of-view?
  • 15:42 IEEEVR community perspective on the rise of consumer VR
  • 17:20 The divide between Old VR vs New VR communities
  • 19:03 Future of Professional VR companies & high-end VR markets
  • 20:41 How the military is using VR
  • 22:42 How corporations are using VR
  • 25:04 Why now? The timing of this VR revolution. Previous low-end VR headsets
  • 27:01 Cutting-edge demos and prototypes at IEEE VR conference
  • 30:03 3DUI conference, and user interface research in VR environments
  • 30:58 Highlights of the future of telepresence keynote from the IEEE VR conference
  • 34:03 Where VR is headed within five years & what gets you excited about what’s to come
  • 35:41 Data visualization within 3D VR environments


Music: “Fatality” by Tigoolio

I’m joined by D of the eVRydayVR YouTube Channel to discuss:

  • Virtual Reality evangelism
  • VR design tips
  • VR communities
  • The future of VR and Education

Here’s a link round-up and overview of topics discussed:

Get in touch with eVRydayVR on YouTube and Twitter and Facebook and at gmail.com.

Music: “Fatality” by Tigoolio