Ganyse: In the game files, you have a launcher "DX12", launch the game with it, it should work
Note, by the way, that currently, the game has a bug that causes a crash (after the second boss), which can only be avoided by launching the game this way
jayventuri: I saw it, for reasons I don't know, the dx11 and dx12 launchers are mapped to a fictional E:/drive and end with the same -dx12 extension
no worky of course, but if I copy the string and edit it for the correct location (D in my case) it still does not work.
I simply copied the entire game folder into a new folder, the folder the shortcut only works with, and no idea why, but this solves it, and at the same time forces basically a second install of the game in that weird folder it points to.
Once that is done, it works, if you make sure the desktop Scale is at 100% and not 150% (I am at 4K and this only was an issue first launch) to launch.
Ray Tracing now maxed on my 7900XTX.
I used FSR from the control panel to get stable 60 at 4K at super quality, you can also add arguments and it may work, but I am keeping the copy of the game where it is in case of any issues, I just made another launcher in my GOG Galaxy for now, named DX12 (RT)