I’m trying to use path tracing with the multi-GPU option enabled. I have three NVIDIA Ada 6000 GPUs. When I select the multi-GPU option in the render settings, the scene renders with visible lines or banding artifacts (as shown in the attached image). However, when I switch to Iray or real-time rendering, the issue disappears.
Is there an additional step or setting I might be missing to properly enable multi-GPU path tracing without these artifacts?
Yes this is a known issue with using the wrong drivers and the older versions. What drivers are you currently using? Are these the brand new Blackwell cards or the older generation? Can you try downgrading your driver to Driver Details | NVIDIA
Also this is a VERY OLD version of Composer. Over 2 years old. Please update and get off Launcher. What exactly are you using in Launcher at the moment? The reason I ask if you really do not need to use Launcher to access our templates now. It is just a front-end shell. Furthermore, it is now Legacy Software which are no longer updating and do not no longer recommend. Honestly, I would just uninstall it now. All of our code has moved off Launcher and into GitHub and our own NGC website.
To download and build the latest Composer and other templates go to:
Or better still just follow these instructions: (Windows)
1. Download "git" from https://git-scm.com/downloads
2. Download "git Large File Storage from https://git-lfs.com/
3. Start a windows command console by using running "cmd" from the Windows Start menu
4. Navigate to where you want to install the kit app template folder
5. Copy and run "git clone https://github.com/NVIDIA-Omniverse/kit-app-template.git"
6. run "cd kit-app-template"
7. run "repo.bat template new"
8. run "repo.bat build"
9. run "repo.bat launch"
To download and buld the latest Isaac Sim template:
Or better still just follow these instructions: (Windows)
1. Download "git" from https://git-scm.com/downloads
2. Download "git Large File Storage from https://git-lfs.com/
3. Start a windows command console by using running "cmd" from the Windows Start menu
4. Navigate to where you want to install the kit app template folder
5. Copy and run "git clone https://github.com/isaac-sim/isaacsim-app-template.git"
6. run "cd isaacsim-app-template"
7. run "repo.bat build"
8. run "\_build\windows-x86_64\release\isaacsim.exp.full.kit.bat"
Thank you, after upgarding the drivers, multigpu works, the reason for using prior driver version was tests on video search and summarization which asks for spesific driver. The reason for using the older version of Composer is for a project we want to use motion path but it crasher in new version, so we have to use version released 2 years ago.
Ok understood. I am glad the new drivers worked. On the latest version of kit, I would keep trying. You want to stay up to date. We JUST released kit 107.3 and I don’t want you to fall too far behind. Try to download it and test it out. Plus we have some amazing new rendering tech, with realtime 2.0
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