This is Leroy Sikkes's talk from GodotCon about the work he's doing at NVIDIA on Path-Tracing in Godot.
It wasn't posted earlier due to a miscommunication; however, Emilio resolved the issue and got the talk posted today.
So NVIDIA, particularly Leroy Sikkes, has been implementing real-time Path-Tracing into Godot 4, so I have been building demo scenes to showcase the new tech. My latest scene is the Attic scene, originally created to showcase Ray-Tracing in UE4. I have remastered it and ported it to Godot, and now it lives again to showcase Path-Tracing.
If you want to play with Path-Tracing in Godot, you can build Godot yourself or download my builds from itch.io. I’ve also linked my demo projects below. If you do download the demos, be sure to set up SSH with GitHub before cloning.
All links are below have fun.
Engine Build: https://johnlogostini.itch.io/godot-rtx
Engine Source: https://github.com/NVIDIA-RTX/godot/tree/nvidia-pt-dlss-dev
Project Source: https://github.com/johnlogostini/NVGWGD_Demos
SSH Github Setup: https://www.youtube.com/watch?v=a-zX_qc2S-M
Hey everyone, the final update for Substance Painter 2024 caused launch failure on most modern Linux distributions, including Gentoo and Ubuntu. So a few months back I spent several days debugging why and finding an exact fix. I have detailed the steps below and recorded a video of fixing the problem start to finish. I was going to make a better video but never got around to it, so I may as well post what I have.
Basically, there are several missing libraries that are being referenced by Painter, as well as artificially missing libraries due to the Steam sandbox. So this works as a fix on Ubuntu 25, and you should be able to modify the process to work on any other distribution. If you have any questions, send me a message and I will answer as soon as possible.
Also, the last version of Painter I own is 2024, so I don't know if this fixes similar issues with 2025 or 2026, but theoretically it should.
Right-click → Manage → Browse Local Files
Open a Terminal in the root of the Substance Painter 2024 installation folder.
Check for missing libraries by running:
ldd "Adobe Substance 3D Painter" | grep "not found"
This will list any libraries that are missing.
libGLU.so.1libtiff.so.5libxml2.so.2libGLU.so.1 by installing the missing package with the following command:sudo apt install libglu1-mesa
6. Verify you have libtiff6 and libxml2 by installing the packages with the following command:
sudo apt install libtiff6 libxml2-16
7. Fix libtiff.so.5 by creating a symbolic link from libtiff6 to libtiff5 by running:
sudo ln -s /usr/lib/x86_64-linux-gnu/libtiff.so.6 /usr/lib/x86_64-linux-gnu/libtiff.so.5
8. Fix libxml2.so.2 by creating a symbolic link from libxml2.so.16 to libxml2.so.2:
sudo ln -s /usr/lib/x86_64-linux-gnu/libxml2.so.16 /usr/lib/x86_64-linux-gnu/libxml2.so.2
9. Launch Steam with compat slr disabled by Closing Steam and relaunching with the folowing command:
steam -compat-force-slr off
10. Disable Steam Linux Runtime 1.0 (Scout) for Substance Painter 2024 by enabling Legacy Runtime 1.0:
Right-click → Properties → Compatibility → Legacy Runtime 1.0