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virtualHCG
Up and Coming
October 23, 2019

Vulkan and HDR on Quest actually possible?

So far the recommendation is to turn off Mobile HDR but I keep reading this articles online referencing that Vulkan would allow for Mobile HDR on the Quest, for example, quoting from https://venturebeat.com/2019/08/10/unreal-engine-now-supports-vulkan-for-oculus-quest-and-go/ :

"Facebook claims that on Epic’s Sun Temple engine sample Vulkan reduces frame times from 16ms to 13ms, a roughly 20% improvement. The company also explained that Vulkan allows for HDR rendering."

I tested it and my project crashes at launch on the Quest when built with Mobile HDR ON and only Vlukan enabled (works fine with HDR OFF and only Vulkan enabled). Is this something actually possible right now? Using OpenGL and HDR ON also causes a crash, which seems to be expected, but I was wondering if based on Facebook's statements this is different with Vulkan. All my tests have been done using the latest 4.23 integration.

Thanks!


    This topic has been closed for replies.

    8 replies

    rasamaya
    Participant
    December 29, 2019
    Yup Vulkan crashes with Mobile HDr for me too. Very difficult to post process or even white balance walls etc. Annoying for sure.
    Ordered and Received DK1 Ordered DK2 within 18 minutes of announcement!! woot! Concerned about facebook thing, but would have done the same myself. Developing the VR gloves you always imagined(over 1 year full-time development, and looking sweet)
    virtualHCGAuthor
    Up and Coming
    January 6, 2020
    From my experience, it seems that unless another forum user knows the answer, questions posted in this forum go unanswered by official Oculus support staff (I guess that is why the forums are listed under the "Self-Help Resources" header in their support page). I've had better luck submitting a bug ticket directly, which might eventually get answered. I just did that here: https://developer.oculus.com/bugs/bug/460164121326245/
    Anonymous
    February 14, 2020
    any news on this?
    Linsomont
    Participant
    February 15, 2020
    Is there any news on the above-mentioned topic?
    Anonymous
    February 23, 2020
    I've been testing everything to get postprocessing but failed miserably. No Quest HDR and PostProcessing layer and Ambient Occlusion.
    Anonymous
    February 23, 2020
    hmm.. PP is for sure to expensive. Even if you would build for the Rift and PC-GPU. But I really wonder how the Mobile HDR effects the performance. Did you run any tests you could share when just using Mobile HDR? 

    thanks a lot for any info... cheers!
    motorsep
    Inspiring
    February 23, 2020
    It's been said many many times - do not use HDR on mobile VR. It's performance heavy. 

    What Epic should have done is provided LDR bloom and some other PP options, so that PP could be used without HDR on mobile (like good ol' PC games that didn't have HDR, but had quite a few PP effects)
    GeoffreyBoy
    Participant
    February 25, 2020

    motorsep said:

    It's been said many many times - do not use HDR on mobile VR. It's performance heavy. 

    What Epic should have done is provided LDR bloom and some other PP options, so that PP could be used without HDR on mobile (like good ol' PC games that didn't have HDR, but had quite a few PP effects)


    Thanks for the tips.

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