从Bevy 0.11开始支持渲染到TextureView，有关更多信息，请参阅pr。
下面是我的web_xr crate的一个expert，它将gl_layer中的TextureView设置为相机可以渲染的目标。在这里创建相机，在这里应用纹理视图。

/// set the texture view in camera
...
let mut entity = commands.spawn(Camera3dBundle {
            camera_3d: Camera3d {
                clear_color, //split screen
                ..default()
            },
            camera: Camera {
                order,
                target: RenderTarget::TextureView(**texture_id),
                viewport: Some(xr_camera.viewport.clone()),
                ..default()
            },
            transform: pose.into(),
            ..default()
        });
}
/// updating the texture view
pub fn update_manual_texture_views(
    gl_layer: NonSend<web_sys::XrWebGlLayer>,
    render_device: Res<RenderDevice>,
    texture_id: Res<bevy_utils::FramebufferTextureViewId>,
    mut manual_tex_view: ResMut<ManualTextureViews>,
) {
    let dest_texture = xr_utils::create_framebuffer_texture(
        render_device.wgpu_device(),
        &gl_layer,
    );
    let size =
        UVec2::new(gl_layer.framebuffer_width(), gl_layer.framebuffer_height());
    let descriptor = wgpu::TextureViewDescriptor::default();
    let view = dest_texture.create_view(&descriptor);
    manual_tex_view.insert(
        **texture_id,
        ManualTextureView::with_default_format(view.into(), size),
    );
}