Meta Quest 3 APK with UE 5.5.3 triples drawcalls when not up close to meshes, compared to UE 5.4.4

Development Platform & Builds XR Development
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3

After another attempt I’ve now figured out a configuration that seems to work and ‘solves’ the problem with the triple draw-calls at a distance.

These are (as far as I can see) the important settings in Project Settings -> Engine - Rendering for having acceptable performance for a Meta Quest 3 APK based on UE 5.5.3:

  • Enable GPUScene on Mobile must be off
    • when this is turned on, there is a slight performance degradation and it causes rendering artifacts at the far right side of the view, especially when turning the camera to the right, as if meshes are unculled a bit too late, so they pop in view
  • Mobile Ambient Occlusion must be off
    • when this is turned on, the number of draw-calls is increased and the performance suffers
  • Occlusion Culling must be off
    • when this is turned on, the number of draw-calls is increased and the performance suffers

In addition, the work-around for Widgets not updating in UE 5.5 was also necessary (not related to draw calls but otherwise menus and other widgets don’t work): Widget Component not redrawing in 5.5.0

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