Headset is blank when used with OpenVR

[gururise]

Installed Release 0.4.2 on Godot 3.3 (Mono Build) on Windows 10.

1. Open (Edit) the Godot Oculus Quest Toolkit Demo
2. Downloaded OpenVR plugin from the AssetLib
3. Plug Oculus Quest 1 via Link Cable and connect via Oculus Link
4. Run the Demo

What happens next is steamvr starts up and OpenVR plugin is detected. The headset tracking is working and I can see the tracking working properly on the display on my PC monitor; however, nothing shows up on the headset itself (ie. its black). I tried changing the engine target fps to 72 to match the Quest 1; however, it made no difference.

Note: I have verified the VR demo in the Godot Tutorial works just fine on the Oculus Link.

OUTPUT LOG:

--- Debugging process started ---
Godot Engine v3.3.stable.mono.official - https://godotengine.org
OpenGL ES 2.0 Renderer: AMD Radeon RX 6800 XT
OpenGL ES Batching: ON

Initializing VR (Toolkit version 0.4.2)
Available Interfaces are [{id:0, name:OpenVR}, {id:1, name:Native mobile}]:
Found OpenVR Interface.
Success initializing OpenVR Interface.
_perform_switch_scene to res://demo_scenes/GodotSplash.tscn
switching to scene 'res://demo_scenes/GodotSplash.tscn'
ERROR: : get_tracking_space(): no ovrBaseAPI object.
Tracking space is: -1
ERROR: : get_boundary_oriented_bounding_box(): no ovrBaseAPI object.
get_boundary_oriented_bounding_box is: [1, 0, 0, 0, 1, 0, 0, 0, 1 - 0, 0, 0, (1.93, 2.5, 2.25)]
Engine.target_fps = 72
Switching model for controller 'oculus_quest_controller_left_1' (id 1)
WARNING: Unable to automatically determine controller model type.
Switching model for controller 'oculus_quest_controller_right_2' (id 2)
WARNING: Unable to automatically determine controller model type.
_perform_switch_scene to res://demo_scenes/UIDemoScene.tscn
switching to scene 'res://demo_scenes/UIDemoScene.tscn'
Changed move speed to 1.000000
Changed smooth turn speed to 90
Changed click turn angle to 45
Switching model for controller 'oculus_quest_controller_left_1' (id 1)
WARNING: Unable to automatically determine controller model type.
Switching model for controller 'oculus_quest_controller_right_2' (id 2)
WARNING: Unable to automatically determine controller model type.
ERROR: : MixedRealityCapture currently requries a special build with the method 'VisualServer.viewport_get_color_texture_id'

[NeoSpark314]

Thanks for reporting this issue. I think the problem is that in the render settings for desktop the framebuffer is set to 3d without effects; can you try to go to your 3d render settings and set the framebuffer allocation for desktop to 3d; I hope this fixes the problem. If it does I should change the defaults in the toolkit project settings.

[gururise]

Thanks for the reply. The framebuffer allocation for desktop was already set to 3D by default. I changed the mobile setting to 3D (just in case) but to no effect. The screen was still black.

I also tried changing the desktop setting to 3d w/o effect and the screen was still black.

[NeoSpark314]

Thanks for trying. Do other godot VR projects work for you? I'm not sure what your exact setup is. I do not have a Desktop VR headset to test myself but I think for others OpenVR worked so maybe it is related to AMD graphics card? Some similar issue was discussed recently on the toolkit discord. Can you try to switch to GLES3 renderer?

[gururise]

Switching to GLES3 and everything worked!

GLES2 results in a black screen (in the headset). I noticed this is also the case on the official Godot VR tutorial as well. Something might have broke with OpenVR + GLES2 in Godot 3.3, as I previously used GLES2 with OpenVR in older versions of Godot.

I posted an issue to the Godot OpenVR repo.