PathTracing not working with the new preview release 2023 (Twinmotion 2023.1.0 (23470244))?

HACK-TAG · April 30, 2024, 2:41am

I tried to enable path tracing but the instructions of the prompt show to activate it (settings> DX12),

it's enabled but still shows the same prompt,

I want to know the new minimum specs for path tracing or some kind of workaround on my current PC specs.

PathTracing On Nvidia Gtx 10 series card (my card is Gtx 1080)

reference like,

For unreal engine 5, to enable raytracing we have to use commands/project engine.ini (r.D3D12.DXR.AllowEmulatedRayTracing = 1)

Please Provide some kind of commands to enable it (PathTracing) on devices like mine.

MisterSmile84 · April 30, 2024, 3:46am

Hello ,

Thank you for posting in the community and we are currently investigating this issue. Please use 2022.2.3 for your Path Tracer needs until we can provide clarifications if those cards will be able to work on Twinmotion 2023.1 (based on UE 5.0.3).

Would you be able to provide me with your OS and build version of the OS, RAM and VRAM specs for reference. If you can also confirm what GPU Driver version you have it would help.

Looking forward to your reply.

Kind regards,

Vincent B.

HACK-TAG · April 30, 2024, 3:46am

Thanks For Reply

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

OS: Windows

Edition: Windows 11 Pro for Workstations

build version: 22621.900

RAM: 32GB DDR4 (2x 16GB)

Graphic/Video Card: Nvidia Gtx 1080 (MSI GTX 1080 GAMING X 8G)

VRAM: 8GB

Driver:

NVIDIA System Information report created on: 12/15/2022 06:59:39
System name: HACKTAG
[Display]

Operating System:	Windows 10 Pro for Workstations, 64-bit

DirectX version:	12.0

GPU processor:		NVIDIA GeForce GTX 1080

Driver version:		526.98

Driver Type:		DCH

Direct3D feature level:	12_1

CUDA Cores:		2560

Core clock:		1683 MHz

Memory data rate:	10.01 Gbps

Memory interface:	256-bit

Memory bandwidth:	320.32 GB/s

Total available graphics memory:	24537 MB

Dedicated video memory:	8192 MB GDDR5X

System video memory:	0 MB

Shared system memory:	16345 MB

Video BIOS version:	86.04.17.00.50

IRQ:			Not used

Bus:			PCI Express x16 Gen3

Device ID:		xxxx xxxx xxxxx462

Part Number:		G413 0000
[Components]

nvui.dll 8.17.15.2698 NVIDIA User Experience Driver Component nvxdplcy.dll 8.17.15.2698 NVIDIA User Experience Driver Component nvxdbat.dll 8.17.15.2698 NVIDIA User Experience Driver Component nvxdapix.dll 8.17.15.2698 NVIDIA User Experience Driver Component NVCPL.DLL 8.17.15.2698 NVIDIA User Experience Driver Component nvCplUIR.dll 8.1.940.0 NVIDIA Control Panel nvCplUI.exe 8.1.940.0 NVIDIA Control Panel nvWSSR.dll 31.0.15.2698 NVIDIA Workstation Server nvWSS.dll 31.0.15.2698 NVIDIA Workstation Server nvViTvSR.dll 31.0.15.2698 NVIDIA Video Server nvViTvS.dll 31.0.15.2698 NVIDIA Video Server nvLicensingS.dll 6.14.15.2698 NVIDIA Licensing Server nvDevToolSR.dll 31.0.15.2698 NVIDIA Licensing Server nvDevToolS.dll 31.0.15.2698 NVIDIA 3D Settings Server nvDispSR.dll 31.0.15.2698 NVIDIA Display Server nvDispS.dll 31.0.15.2698 NVIDIA Display Server PhysX 09.21.0713 NVIDIA PhysX NVCUDA64.DLL 31.0.15.2698 NVIDIA CUDA 12.0.89 driver nvGameSR.dll 31.0.15.2698 NVIDIA 3D Settings Server nvGameS.dll 31.0.15.2698 NVIDIA 3D Settings Server

!!!

Just for reference: Solved: Can't Enable RayTracing in UE5 (gtx 1060)(Nvidia Pascal) - Development / Rendering - Epic Developer Community Forums (unrealengine.com)

I'm able to use raytracing on my pc in UE 5.0.3 by editing this in the source code:

"Engine/Source/Runtime/D3D12RHI/Private/D3D12Adapter.cpp"

"\Engine\Source\Runtime\D3D12RHI\Private\Windows</p>

WindowsD3D12Device.cpp"

THANKS TO kotn3l | Epic Developer Community (epicgames.com)

re-exposing this parameter for the user to access raytracing for the Nvidia pascal card holder

"#define DXR_ALLOW_EMULATED_RAYTRACING 1"

before that in UE 5.0 just simply by a command in Config - DefaultEngine.ini

"r.D3D12.DXR.AllowEmulatedRayTracing = 1"

Please Share This chat with the developer in Twinmotion Team

Hoping for a positive response.

PortMichael · April 30, 2024, 3:47am

Hello,

I have exactly the same problem.

NVIDIA G-Force GTX 1080 .

Under 2022.2.3 no problems.

Best regards

Michael

HACK-TAG · April 30, 2024, 3:47am

Epic Twinmotion developer team added a new function in their code to assure that path tracing will not load on the NVIDIA pascal architecture-based card.

I Am asking them(Twinmotion Team) to disable this function or allow us (Customers) to disable it with an additional command in the launcher.

Here is the Way to achieve it

simply changing this code.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

this is the additional command

"r.D3D12.DXR.AllowEmulatedRayTracing = 1"

based on UE 5.0.3 Build they have to re-enable this

"#define DXR_ALLOW_EMULATED_RAYTRACING 1"

Along with the above code snippet.

I am hoping for a positive reply from Epic Twinmotion Developer Team.

Steveday1 · April 30, 2024, 3:47am

Thanks for posting mate, I contacted TM support with the very same issue. You are a step ahead of me. I am watching with great interest

HACK-TAG · April 30, 2024, 3:47am

if anyone needs a temporary solution, you can use this custom patch from one of the known reverse engineers,

based on the above code snippet.

If you need Downloadable link please CHeck This

Please Inform me before,

about any action going to take by the legal team on behalf of Epic on this. (My Action of sharing the modified executable on the support form).

My intention in sharing this patch is only for those customers/friends like me who need a quick working solution on their old (Pascal architecture Card).

Steveday1 · April 30, 2024, 3:47am

Thanks very much for your help but I will have to wait as I am not experienced enough to understand what you mean

Steveday1 · April 30, 2024, 3:47am

TM 2 THanks mate I think it worked. Should I get rid of the other file?

Bussimann · April 30, 2024, 3:47am

I have the same problem and hope for quick change...my system:

Intel Core i7-8700K CPU @ 3.70GHz 3.70GHz 64.0GB 64-bit operating system, x64-based processor Windows 10 Home Graphics NVIDIA GeForce GTX 1080TI

Steveday1 · April 30, 2024, 3:47am

I think you need to go back and follow the thread. All the information for a fix is in the thread

ATELIERCREATIF · April 30, 2024, 3:47am

Workink fine with my 1080ti !!!! Thanks a lot

anonymous_user_756deb70 · April 30, 2024, 3:49am

Thanks for the fix. That did the trick...👍

Rob246 · April 30, 2024, 4:03am

this worked perfectly, thank you so much

is there any chance we can get a new patch for 2023.1 Preview 2? I seem to be having the same issue after the update..

salama_hikal · April 30, 2024, 4:03am

Can you please upload a new version of your patch for TM preview 2,

Wolfarelli · April 30, 2024, 4:03am

Preview 2 came out today and it has the same problem, path tracer not working on a GTX1080 with DX12 on.

@HACK-TAG, we would be very greatful if you could work your magic and patch the new exe, please.

Luke_Parmenter · April 30, 2024, 4:03am

Hey @Himanshu Game Dev I don't suppose you have another patch for 2023.1 PREVIEW 2 the new release. I have just tried the patch you uploaded and It wouldn't start. I have 1080TI and have experienced the same problems as above

kanyno74 · April 30, 2024, 4:03am

@Himanshu Game Dev - PLEASE NEM PATCH FOR 2023.1 PREVIEW 2???THANKS!!!

anonymous_user_756deb70 · April 30, 2024, 4:03am

I have the same problems here using 2023.1 Preview 2. Using Windows 10, I9-10900 2,8GHz, RTX3060.

I'm very interested in such a patch to.

anonymous_user_756deb70 · April 30, 2024, 4:04am

I did use the patch before and it work perfectly! Now I have the same problem for the preview 2...

Please if you have the patch can you upload for everyone? Thank you so much!