No matter what I cant seem to get Unreal engine to launch in VR. I have run the Room set up, standing and room scale, the plugin in is installed, and yet unreal crashes every time. The HMD shows that unreal engine is loading, but it crashes.
Reinstalled multiple unreal versions with no effect.
The only factor I can think of being different is if the Elite is supported or not…
Please help. I bought the headset just for use in the Unreal Engine.
Works with other games, and independently… just not with the editor.
Any luck with this? I’m experiencing the same. Version 4.24.
No luck yet. But were not alone brother. Lets get as much info as we can. And upvote for more viability.
Do you get the same error I do?
"
Assertion failed: Mesh.IsValid() [File:D:/Build/++UE4+Licensee/Sync/Engine/Plugins/Runtime/Steam/SteamVR/Source/SteamVR/Private/SteamVRRender.cpp] [Line: 79]
UE4Editor_Core
"
Post as much info, lets get this noticed and solved. Know anyway of getting more attention to this issue? (I wanna fix this).
Exact same error, whether in VR mode or running a VR preview. I submitted a crash report on the site, but not sure what else to do to get attention.
Assertion failed: Mesh.IsValid() [File:D:/Build/++UE4/Sync/Engine/Plugins/Runtime/Steam/SteamVR/Source/SteamVR/Private/SteamVRRender.cpp] [Line: 79]
UE4Editor_Core
Curs0
April 30, 2020, 3:36pm
5
the crash seems to be caused by SteamVR not retrieving occlusion meshes for cosmos elite hmd and then failing in SteamVRRender.cpp
static void DrawOcclusionMesh(FRHICommandList& RHICmdList, EStereoscopicPass StereoPass, const FHMDViewMesh MeshAssets[])
{
check(IsInRenderingThread());
check(GEngine->StereoRenderingDevice->DeviceIsStereoEyePass(StereoPass));
const uint32 MeshIndex = GEngine->StereoRenderingDevice->GetViewIndexForPass(StereoPass);
const FHMDViewMesh& Mesh = MeshAssets[MeshIndex];
check(Mesh.IsValid()); // crash here
Unfortunately, I can’t test it directly, but I’m pretty sure that
const vr::HiddenAreaMesh_t LeftEyeMesh = VRSystem->GetHiddenAreaMesh(vr::Hmd_Eye::Eye_Left, MeshType);
is returning a 0 triagle count mesh.
https://github.com/ValveSoftware/openvr/wiki/IVRSystem::GetHiddenAreaMesh
can anyone test if adding
[/Script/Engine.RendererSettings]
vr.HiddenAreaMask=false
to engine.ini or defaultengine.ini can be a workaround?
Curs0
April 30, 2020, 9:34pm
6
ok, I was able to test it with a user, disabling hidden area mask as stated above, solve the crash.
I’ve also reported the issue to Valve
https://steamcommunity.com/app/250820/discussions/3/2268069450209381177/
Thanks for the amazing technical detective work. Unless someone can post a easy tutorial (Im a virtual production student, not a programmer) I may have to wait for a fix from Valve or Epic.
Curs0
May 1, 2020, 8:54am
8
just put this in the DefaultEngine.ini (config folder) and restart the engine
[/Script/Engine.RendererSettings]
Thank you! It works! You just opened up a new world of story telling via Virtual Production/VR for me.
1 Like
Curs0
May 1, 2020, 1:06pm
10
you are welcome! mark this as the correct answer
Hi all, the issue has been addressed with Beta 1.0.12.2 released for Vive Console.
https://developer.vive.com/resources/knowledgebase/joining-vive-cosmos-beta-program/