I just want to make sure, when you go to Edit > Preferences > Graphics hardware support the DirectX12 option is already selected?
That should be all that you need to run the Path Tracer. If that doesn't fix things, then please try following the steps in the Twinmotion is not visible after splash screen article to reset Twinmotion back to a default configuration. This might be caused by a faulty configuration file, so resetting it to default might fix this.
If that doesn't work, let me know and I can look into other possible solutions. If you could send screenshots, that would also be helpful.
Hello, I replied to your email but just realised it said donotreply.
I have checked the preferences and yes DX12 is selected.
I also tried the steps you mentioned about the splash screen and that didn't work either. When you hover over the path tracer button on an error message
'The path tracer is deactivated because dx12 is disabled in the settings panel'
Thanks for letting me know. This is really strange, since everything should be set to enable DX12.
I just want to confirm, were you previously able to use Path Tracer on any of the three affected computer before? If so, was there any noticeable change to the three computers that occurred prior to this issue coming up?
One possibility could be an update to faulty drivers. There are newer drivers available for your GPU, and you can try updating your drivers - the latest 522.30 Studio drivers can be downloaded here. If that doesn't help, you might want to rollback to previous the previously installed drivers prior to 516.94.
I managed to solve the issue. It appears to be that when I have the HDMI output for my monitor connected to the Quadro m4000 Twinmotion won't use the RTX 3090. I switched the hdmi to the rtx 3090 and the pathtracer became active in twinmotion.
Since you've tried just about everything else, the only other thing I can think of is to do a full uninstall and re-install of Twinmotion. To do this, uninstall Twinmotion through the Epic Games Launcher, then delete the Twinmotion2022.2 folder located in Documents. Once that's done, you can try re-installing and seeing if that fixes the issue.
If the issue persists, then I'll need a copy of the Twinmotion.log file to get a closer look at what's happening (Where to find Twinmotion .log file).