There are problems with the NEW for 5.5…0.preview Path tracing the code has been changed causing problems. There is not as much interest now the UE 5 EULA Licencing has started.
So far by volume 5.3 LGPU has been the most popular.
This probably wont be fixed for a few updates and currently LGPU is very unstable so MID 2025 seems realistic
The instructions have changed to
DefaultEngine.ini file. Under the renderersettings category, add the following line:
“r.PathTracing.Experimental=True”
Reopen the project and change the viewport mode to Path Tracing.
Open the console and enter “r.PathTracing.AdaptiveSampling 1” and press Enter.
@Jimbohalo10 Hi, I don’t use ‘LGPU’, so I can’t say anything about that. I’ve tried ‘Adaptive Sampling’ in UE 5.4.4 and it works as expected, but I can’t try it in 5.5 because without a proper DLL - ‘Pathtracing’ doesn’t work for me. So, I can’t say anything about it either… For me, buggy ‘Adaptive Sampling’ is not a “deal breaker” because I’m not a fan of that feature
Anyone know why Epics GPU Lightmass isn’t working with AMD Gpus? aren’t AMD GPUS over 6000 series supported?
Baking static lighting puts out no shadows and no GI and baking stationary lighting gives shadows like dynamic lighting and no GI. i’ve seen other people with my exact issues and one of them said it just worked instantly when they switched to an NVIDIA GPU
I´ve literally tried everything on this threads, except compiling Unreal. Replacing files, rewriting the lines of code, everything and nothing works. I´ve been doing it in 5.4.4 and I have a GTX 1650, any ideas?
Also 5.5.0 came out recently, will there be a solution for that version?
Is there any Console variable and .dll file Updated for 5.5 Unreal engine for Old GPU Arous 1080 TI for Ray trace, Path Trace or Nanite @JohnDow@Jimbohalo10 Need Help
Hi @JohnDow ,
So Far the original code GTX EMULATION code is now back in 5.5 .
The 5.5 code is running just having problem when running cannot get pathtracing menu
Now have a problem 5.4.4 source which was used to build 5.4 code has crashed.
The project used to test this has crashed.
Spent most of my time in VS2022 code, bypassing 5.5 attempts to stop raytracing.
In 5.5 you will see the raytracing button in project creation has been removed.
The bypass code finalised now on the repository if needed.
THIS IS MOST IMPORTANT - YOU MUST BACKUP PROJECT WITH ZIP/WinRARBEFORE
TRYING THE 5.5.1 VERSION
THERE S NO WAY TO GO BACK TO 5.4!
There is no point in using 5.5 version as in the post below the new features work in 5.5.4
Remember this WORKS ONLY WITH NEW 5.5 projectWONT work with older 5.4 projects!.
You have been warned
hi John, Yes 5.4.4 open project select Path tracer, then close project and zip it up
Keetp getting
[2024.12.06-17.01.18:999][ 0]LogRendererCore: Ray tracing is disabled. Reason: not supported by current RHI.
Nvidia drivers have removed support for 1050 DXR Emulated ray tracing!!
UPDATED GTX 1050 NO LONGER SUPPORTED AFTEE DRIVER VERSION 473
ALL COPIES HAVE BEEN REMOVED SO 5,4/5.5 ARE THE LAST ONES FROM ME.
Not work for me any solutions on this post…but i have a GTX 1050 Ti. Maybe this is my problem. Is there no way to enable path tracer with my video card? I use UE 5.4.4 or 5.5.1
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