I’m fairly a newbie in UE, but not in cg (blender & godot) and I’m learning.
I’ve begun with the beginning: https://youtu.be/fSbBsXbjxPo?t=809.
Now the question: why does nothing change when I enable “cast raytraced shadow”?
My specs are: UE 5.1, nvidia rtx2070 driver 525.60, debian 11.
Is this a directx-only function?
Here 2 screenshots.
Hey.
What are your project settings in rendering tab related to lumen, ray tracing GI, etc?
Sorry, I’ve forgotten to write the settings!
As target RHIs: vulkan desktop (sm5)
Other options (hopefully all):
Really? No ideas?
It does not work to me too. Linux mint 21. RTX3070, UE 5.1
Looks like Ray Tracing does not work on Linux at all.
It would be a great pity in this case!
I’d like to know if it’s a vulkan limitation and I’ve get to use windows to access this feature or if it’s a distro+driver problem, I mean: more updated distros have cast raytraced shadows working (e. g. arch or fedora).
I wasn’t aware there was a raytracing support for Vulkan (DX12 only?) But this post proves otherwise:
Ray Tracing support using the Vulkan RHI (4-27 & 5-0) - #10 by focalcgi
The console command is different in vulkan, seems to be:
" r.Vulkan.RayTracing"
instead of “r.RayTracing.SomeRayFeatureHere”
If anyone knows of a library to manage raytracing and test for platform support, instead of dealing with the console, I’m interested 
I moved my answer here: Ray Tracing support using the Vulkan RHI (4-27 & 5-0) - #15 by izumi_hanaishi
