Scene still displayed in after closing VR Preview

I tried changing my mirror mode settings for the VR preview (attempting to get a fullscreen image on the mirrored window) via console commands from a BP node.

After starting a VR preview with the ‘HMD mirror mode 4’ command (which I see some have reported as not working for the ), I got a black screen on the mirrored window. When I closed the VR preview, a frozen image of my scene was still displaying on the HMD, though I had closed the preview, so that I couldn’t see the typical home area.

I changed the Engine.ini WindowMirrorMode setting to 2 as suggested in the forums, and this fixed the black mirror window (though in stereo distorted format instead of the default), but when I exit VR previews, the last frame of the scene I was playing is still visible on the HMD.

EDIT: It seems like the frozen frame issue also happens with clean projects. I may have just not noticed it before. Also, my mirror window is appearing normal in these cleans projects (with vertical black bars on either side of a mono image).

That frozen image is normal as long as you have the editor running. This doesnt happen with a packaged game as far as i experienced.
Regarding the mirrow window, yes, this is quite “broken” in UE4 and only works correctly on the Oculus Rift. If you try to modify those settings on the , things like the black mirror window happen. Also, while for the oculus the mirror mode 2 should be the “normal” mono one, for the mode 2 is stereo view. Try setting it to mode 1 manually in the config file.

Cheers,

Hello BioeJD,

I noticed that you said that you could reproduce this issue in a clean project. To insure that we are seeing the same issue, could you provide a detailed list of steps to reproduce this issue on our end?

I guess I described 2 issues here.

Black window screen issue:

  1. Open project with SteamVR plugin enabled
  2. Add console command node to level blueprint (or other) w/ “HMD mirror mode 4”
  3. Compile and save BP
  4. Run VR Preview (and see the mirrored window)

Frozen image in HMD issue:

  1. Open project with SteamVR plugin enabled

  2. Run VR Preview w/ HTC

  3. Close/exit VR Preview (but not UE4 Editor)

  4. Look inside after exiting the Preview (make sure to be sitting down, you may get disoriented)

Hello BioeJD

After doing a bit more digging I was able to find that these are known issues. I have provided links to the public tracker. Please feel free to visit these threads for future updates.

Black screen

Link: Unreal Engine Issues and Bug Tracker (UE-32419)

Image freeze

Link: Unreal Engine Issues and Bug Tracker (UE-29224)

Make it a great day

Wonderful, great digging! Have a great weekend!

(Yes, I probably shouldn’t use comments like this, but c’mon I gotta give the staff some love. They’re awesome.)