Hi! Thanks for sharing. Did you tested?
This was tested by others , independently
@Kuekuatshew, I tested it and it works:
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why this â â â â thread keeps popping up, tbh? a 10 series will not do any raytracing. some screentraces and raymarching, but thatâs it.
/thread
hi @glitchered ,
So why do you keep calling Hardware Lumen Raytracing crashing UEFN and Fortnite progress.
Most of my time is spent as an indie finding out why the RTX50xx group is crashing.
The workaround is to enable Lumen software emulation always until they figure why UE 5.6 that powers UEFN/Fortnite wont do hardware ray tracing without crashing UEFN/Fortnite.
So they use software emulation like on GTX 10xx cards.
Fornite ($2 million a day) now pays for all Epic products development.
When UEFN is really broke, Epic Support ask for Indie Engine developers to help find a workaround.
The only thing that really works on RTX 50xx is
Luoshuangâs GPULightmass Unreal Engine 5.4.3 and 5.4.4 patch Lightmass baking using CUDA code.
Massive speed boost GTX 1080 does in 2.5 hours (170 mins approximately)
The RTX 50xx does this same baking job in 18 minutes, and this is not hardware ray tracing.
EPIC Hardware Ray tracing version is 110 minutes? 
There is a problem with heat.
The PC needs to have water-cooling, or else the RTX 50xx just burns up the PC. 
Just use software emulation so that way the PC does not get toasted. 
Nvidia claims to have found the problem is the driver, but the new version does not fix the Hardware Raytracing crashes!
Here is a posting in Fortnite where Hardware Ray tracing is on (GPU Timeout) in UEFN
IMHO, stop moaning about this thread and look at your beloved Hardware Ray tracing in reality it used to work but its broke now!
Hi @JohnDow! Thank you. I tried but doesnât work for me. I followed the instructions posted by @Jimbohalo10, but nothing. If you have any clue or suggestions are welcome:-)
My 4090 has sopped to work and I have to finish a project Iâ m working on, and the only GPU I have at the moment is a 1080.
Hi @Kuekuatshew
GTX 1080 Ray Tracing will only work as the only GPU.
The 4090 needs to be removed or disabled in the BIOS, and hopefully, that will work, but only with ONE graphics card.
LGPU and Epic Gpu only recognise one GPU.
You will need to open the Nvidia control panel app, unload the drivers, restart the PC, and then reload the correct drivers for the 1080.
RESOLVED: Known issues with NVIDIA 576.02 drivers on RTX 50-series GPUs | Epic Developer Community
There were problems with drivers, and thatâs why you need to remove the original drivers.
Hi @Jimbohalo10 ! Thanks fro the quick response. I did already what you suggest in your post, but without any results. I am using Windows 11, Unreal Engine 5.6 and 1080 GTX.
I checked the LogFile and this is what the only warning I get: âLogD3D12RHI: Warning: Ray tracing is disabled for NVIDIA cards with the Pascal architecture.â
Looks like thatâs the problem. I have 1660GTX (Turing) which is basically RTX 20 series but without tensor cores.
@JohnDow I see the point, but I tried with an older Unreal Engine version and it works. But I need to make it works with the 5.6. Should I try to compile Unreal 5.6 with the edits and see what happens? I am open to suggestions:-). Thanks!
Hi @Kuekuatshew, @JohnDow
Looking at the 5.0 code, they checked if this was emulated and continued
in 5.3 thy just if pascal fail as they had removed emulation.
So somehow need this back into 5.6
Will be a while though to rewrite code
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Exactly my case. And after all the manipulations with the D3D12RHI the editor shows a warning âThe project attempted to launch with DirectX12 and SM6 shader model which is unsupported by your system, so features like Virtual textures and Nanites will not workâ. Although Nanites and Virtual textures obviously do work.
Hope someone can get this working for 5.6. I got it working on 5.3 but specular doesnât look right with the hair shader unfortunately
hi @Kritzien @Kuekuatshew @JohnDow , @AmbulanceMan ,
The repository is now updated. Please update your 5.6 from folder ue56 as there are many fixes and use the safer installation described.
There was a fatal error in the past method.
To test this, found all the previous versions, written by others and tested them.
Found that they had support for GTX 1080, which was in 5.1 repository.
A lot of comparisons found that ALL Pascal GPUs were removed from working
The repository with the new safer installation procedure for 5.6 1080 upwards is at
GTX-RTEMU-543-bin-patch/README.md at GTX-RTEMU-543-bin-patch ¡ jimshalo10/GTX-RTEMU-543-bin-patch
The 1050 will NEVER work because the Nvidia driver no longer supports this.
There is an Nvidia version called nvrt source, which supports all devices, but this is 5.1
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Thank you, I will try this soon!
holy s**t it works!
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Hi @Jimbohalo10! Thank you for sharing! Iâve just tried and it works like a charm!