I have a NVDIA GPU and no idea what could be the problem here, unfortunately. The only thing that comes to mind is that when you bake textures you need to disconnect the metallic node or turn it to 0, otherwise the bake will be completely black. No idea if this is related but it looks like it might be a problem with reflection?
You tried to uninstall and reinstall the GPU drivers? Are there different versions of the drivers (for NVDIA there are) that you could try?
Have no idea if they’re any good but since you ppstwd this in Linux maybe one from the people that do PopOS:
Used Adobe for years, made an effort in the last year to switch to FOSS, mainly Inkscape and Scribus. And yes, as other comments have mentioned these tools have some weird quirks and some things don’t work. But that’s the same for Adobe and most other software. I remember switching from Macromedia Freehand (lol, remember that) to Illustrator back in the day and everything felt just wrong and awful in tge beginning (until you learned to work around the quirks?). It’s super hard to tell how much it’s “Software Bad” vs “Not Used to New Thing” and this will be different for everybody as well. But nobody (including the software) is stopping you from using this professionally, I just finished a 20 page PDF for a client with Scribus, used it to print my 32 page comic etc.
Yeah, +1 for Calibre amd DeDrm, recently I needed to jump through some more hoops since Amazon stopped delivering to that old Kindle Desktop version for PC and needed to use the Android version but generally works pretty well. I’m also surpised how many of the books I read actually don’t have DRM at all but that is obviously down to my obscure taste (mostly indie SFF).
If all else fails I just buy the book with DRM and then pirate it from the high seas, no harm done (except for the harm supporting big platforms like Amazon does 🤷♀️).
Yeah, without knowing anything about tiling if these are real tiles they did an amazing job.