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Distance Field Ambient Occlusion not visible in VR Preview window

Hi All,

Trying to troubleshoot a problem that seems specific to my workstation. I have a simple scene with Distance Field Ambient Occlusion enabled (tinted red so that it is easily visible). In the editor viewport and and when playing through "Selected viewport" or "Standalone" it is visible:

alt text

However, when I switch to the VR Preview, the Distance Field Ambient Occlusion is not rendered:

alt text

I'm using the normal deferred renderer with temporalAA, and the exact project renders correctly on a friend's workstation so I can only assume that whatever setting is different sits outside of the config files that are bundled with the project. I'm at a loss for what it could be though.

Any pointers that would assist in me troubleshooting this will be greatly appreciated. Thanks!

Product Version: UE 4.14
viewport.jpg (131.8 kB)
vrpreview.jpg (85.0 kB)
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asked Dec 07 '16 at 11:50 PM in Rendering

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avatar image Emil.Klingberg Mar 15 '17 at 11:55 AM

Hey did you figure it out, i can get some Ao to work in VR, but its definitively not the Distance field AO

avatar image ZEROONESTUDIO Mar 20 '17 at 08:22 AM

Hey I'm having the same issue as well. I'll try it on another machine tonight and see if it is machine-specific.

avatar image ZEROONESTUDIO Mar 20 '17 at 09:04 AM

Can confirm it is not working on a different machine

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2 answers: sort voted first

Looks like it won't be fixed any time soon - Unrealengine123 has put the case for DFAO in VR being a bug and Epic has entered it:


See bug here:


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answered Mar 31 '17 at 10:47 PM

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Do you find DefaultScalability.ini in you project's config/ directory? Under [PostProcessQuality@#] sections, try set r.AmbientOcclusionLevels=0 to 1. I didn't test it myself, but according to this answer: https://answers.unrealengine.com/questions/523222/postprocess-features-not-working-in-the-vr-templat.html this might help.


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answered Jan 12 '17 at 05:28 AM

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avatar image Fisher007 Mar 20 '17 at 05:04 PM

That is only an issue if you are using the VR template. Doesn't work in this case, as it seems to be global. I have checked both with 4.14 and 4.15.

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