I have a scene with normal Standard Material meshes, custom shaders and lines. In the browser (also with the simulated VR cam) it show up fine. On the Quest it works fine as well, however if I turn on Multiview the axis/lines and custom shaders on not visible. The simplest case is is here. Note its fine in the browser, even in Firefox Reality on the Quest, but as soon as you go click the VR headset icon it is not longer visible.
Firefox remote debugging spews a bunch of…
WebGL warning: drawElements: Multiview count mismatch: shader: 1, framebuffer: 2
Are there some settings that have to be enabled to make Multiview work properly?