OpenGL doesn't render to a 2-layer backbuffer like D3D/Vulkan for quad-buffered stereo, instead drawing twice with the eye selected by glDrawBuffer() (see OGL::Renderer::RenderXFBToScreen).
OpenGL doesn't render to a 2-layer backbuffer like D3D/Vulkan for quad-buffered stereo, instead drawing twice with the eye selected by glDrawBuffer() (see OGL::Renderer::RenderXFBToScreen).