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Inspiring
June 6, 2018

[Go / Gear VR] Are UE 4.20 updates relevant to mobile VR ?

@imperativity

4.20 preview 1 is out and it has some interesting goodies: https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1485599-unreal-engine-4-20-preview

I am wondering if any of those goodies relevant to Go / Gear VR (GLES2 and Vulkan in the nearest future):

Instanced Stereo Rendering: Translucency Support. We’ve taken the improvements to the Instance Stereo Rendering (ISR) path that we made for Robo Recall, and improved them to work across a more robust set of features in the engine. 4.20 adds support for performing the translucency rendering pass using ISR, which can significantly reduce CPU cost on translucency-heavy scenes

Mobile Updates:
  • All of the mobile improvements and optimizations we’ve made for Fortnite on iOS and Android
    • Improved Android Debugging
    • Mobile Landscape Improvements
    • RHO Thread on Android
    • Occlusion Queries on Mobile
    • Software Occlusion Culling
    • Platform Material Stats
    • Improve Mobile Specular Lighting Model


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    43 replies

    November 8, 2018

    motorsep said:


    maxBr said:

    @motorsep too bad - any new goodies / fixes you did find in 4.21 that do make a (small) difference for VR / GO?


    Round Robin occlusions, fixed (allegedly) software occlusions from 4.20. GLES 3.1 supposedly working with multiview now and with FFR (I haven't tested yet, waiting on Oculus 4.21 integration release).

    I don't really know what else is done under the hood to aid performance on Go. I assume any optimization on CPU side of things done for Fortnite would help on Go too.


    With 4.21 I tested hardware occulsion with GLES 3.1 and multiview on and it's now working on the Go! This should bring a pretty big improvement for some projects. Unfortunately I can't see exactly how much improvement as the debug canvas does not appear to be showing many of the stat commands properly. I reported this and Epic has a fix marked for 4.22:


    please upvote :)

    motorsepAuthor
    Inspiring
    November 8, 2018
    Upvoted ! It feels like Epic takes one step forward and two-three steps back when it comes to VR (or maybe even Oculus specifically, especially taking into considerations recent TimS's whinings on Twitter about Oculus platform) with every new release :(
    MaxArch
    Inspiring
    November 12, 2018
    Another bug that needs some upvoting (PPV in LDR); https://issues.unrealengine.com/issue/UE-61387