Unity 2020+ New XR Plugin Management System Support

[ozgurozansen]

Unity has deprecated the support for Leagacy XR under Player Settings for Stereo Display (non head-mounted) option. Their new XR Plugin Management System assigns the responsibility of XR support in Unity to the vendors of XR devices (such as Oculus, HoloLens and HTC Vive).

Since Stereo Display (non head-mounted) option is vendor-independent way of XR imagery, there is currently no XR plugins for CAVE-like systems. Which means there is currently no way of using Stereo Display in Unity 2020+ versions, including UniCAVE.

Do you have any plans for supporting the new XR Plugin Management System of Unity to enable UniCAVE in new versions of Unity 2020+?

[antonsluijtman]

We are running into the same issue and would also very much welcome a XR plugin for Stereo Display (non head-mounted) for our CAVE system.

[JacExe]

The fact that Unity dropped support for Stereo Display (non head-mounted) so brutally left me very disappointed. To date the only compatible with Unity 2020 is MiddleVR which however does not use XR Plugin Management System, I believe it still works with the old method to force the Quad Buffer via DLL Injection and OpenGL instructions
I've studied the XR SDK's doc a bit, but it's very complex, I don't think many people have the skills to develop a plugin from scratch.

[interactive3d]

Hi @ALL, Is there any solution for this? I also want to get Unity to work with a single screen stereoscopic projection system and with a 4x wall CAVE.

[ozgurozansen]

Hi @ALL, Is there any solution for this? I also want to get Unity to work with a single screen stereoscopic projection system and with a 4x wall CAVE.

Apparently, you are still able to use Unity's native stereo option Stereo Display (non head-mounted) through an editor script even though it is deprecated and removed from Project Settings, with the following bunch of code:

PlayerSettings.virtualRealitySupported = true; UnityEditorInternal.VR.VREditor.SetVREnabledDevicesOnTargetGroup(BuildTargetGroup.Standalone, new string[] { "stereo" });

Please remember that, you should be running Windows 8.1+ in your system, since it is dependent to Direct3D 11.1.

For a detailed discussion and running demo, you can refer to Vital-Volkov's cool stereo study page:
https://github.com/Vital-Volkov/Stereoscopic-3D-system-for-Unity-2019-/tree/Direct3D11.1

[thomasschichl]

Hi, @ALL
I found this thread because at our university we are using a powerwall system and unity. As we want to create 3D stereoscopic scenes in the future as well, I am trying to find a solution for the problem the unity is no longer supporting non HMD. Of course there are software solutions available (like MiddleVR or more3D)- but these solutions a very expensive and we can'r afford them. Of course there are solutuions available like uniCave (which is free for use) but very complex to paramtrize as well and not suitable for our system.
So I tried Mr. Volkovs solution. Unfortunately I wasn't able to activate the 3D stereo mode on a windows 10 system. (player setting on rendering auto graphics api for windows - directx11). testing it on a windows 8.1 system makes no sense in our case. So has anyone been able to activate the 3D stereo from Mr. Volkov on a windows 10 system? btw- I treid it on Unity release 2020.3.0f1 and 2020.3.13f1.

for older version (up to the latest 2019 LTS) the non HMD display is still supported. So at we have support till the end of 2023.

My last question would be about the follofwing source:
https://www.gamedeveloper.com/programming/quad-buffered-stereoscopic-3d-with-unity3d

I know, it is pretty old but actually the exact idea XR-Jaro mentioned: Quad Buffer via DLL Injection and OpenGL instructions
Did someone try this solution?- I will try to implement it next week but if someone has expriences or already knows that it will not work out it would save me some time ;)

[yaoshun35]

m assigns the respo

same problem . we also using powerwall system in university. MIddleVR is too expensive and only way for me is using Unity2019+legacy xr setting. It works well currently.

I have confirmed with offical worker that Non-HDM will not avaiable in Unity2020+.and Mr.Volkovs solution not suitable for our devices,nvdia 3Dvision didn‘t activated by his demo. My system : win10,RTXA6000.

[yumendetuzi]

Hi, @ALL I found this thread because at our university we are using a powerwall system and unity. As we want to create 3D stereoscopic scenes in the future as well, I am trying to find a solution for the problem the unity is no longer supporting non HMD. Of course there are software solutions available (like MiddleVR or more3D)- but these solutions a very expensive and we can'r afford them. Of course there are solutuions available like uniCave (which is free for use) but very complex to paramtrize as well and not suitable for our system. So I tried Mr. Volkovs solution. Unfortunately I wasn't able to activate the 3D stereo mode on a windows 10 system. (player setting on rendering auto graphics api for windows - directx11). testing it on a windows 8.1 system makes no sense in our case. So has anyone been able to activate the 3D stereo from Mr. Volkov on a windows 10 system? btw- I treid it on Unity release 2020.3.0f1 and 2020.3.13f1.

for older version (up to the latest 2019 LTS) the non HMD display is still supported. So at we have support till the end of 2023.

My last question would be about the follofwing source: https://www.gamedeveloper.com/programming/quad-buffered-stereoscopic-3d-with-unity3d

I know, it is pretty old but actually the exact idea XR-Jaro mentioned: Quad Buffer via DLL Injection and OpenGL instructions Did someone try this solution?- I will try to implement it next week but if someone has expriences or already knows that it will not work out it would save me some time ;)

Did you test it?

[rolandha]

Probably you could use Unity to render with DX11/12 to two textures (left and right eye, rendering in the background) and then use e.g. Spout [1][2] (which is wrapping the NV_DX_interop2 extension) to transfer it to an opengl application (which you need to write and which also uses the Spout SDK), which is rendering the textures to the screen using quad buffer stereo.

In case you do not want to use Spout, you can implement it directly with the interop extensions [3] and the native unity texture handle [4].

Just an idea, have not tried it yet.

[1] https://github.com/leadedge/Spout2
[2] https://github.com/keijiro/KlakSpout
[3] https://registry.khronos.org/OpenGL/extensions/NV/WGL_NV_DX_interop2.txt
[4] https://docs.unity3d.com/ScriptReference/Texture.GetNativeTexturePtr.html

[medinags]

Hello everyone,
Do you know if there has been a solution to this problem, I am thinking of developing for CAVE using Unity 2021, but I just found this problem.
I downloaded the uniCAVE package for Unity 2021, and I am encountering this problem:
"Stereo display non-head mounted" not enabled
Any help?

[CamiloMGS]

I know this is an old post, but Unity is taking ideas for their AR/VR roadmap. You can post here UnityRoadmap telling them to support "Stereo Display (non head-mounted)" again. If we all post here maybe they will consider it.

[MichaelOvens]

I've just spent most of a week trying to get the DLL injection method described in https://www.gamedeveloper.com/programming/quad-buffered-stereoscopic-3d-with-unity3d to work. I was able to get to the point of intercepting the SetPixelFormat calls being made by Unity, but setting the PFD_STEREO flag (and setting up the Unity cameras as described) did not result in a stereo output on our quad-buffer-capable system.