PaladinNO: There is no mention of system specs in your post, but I presume you knew the new DLSS 3.0 is currently ONLY for RTX 40-series cards, such as the RTX 4080 and 4090.
If you don't have either of those cards, there is no reason to install the new patch. There are no other changes in the patch.
https://www.cyberpunk.net/en/news/47434/dlss-3-reflex-pc-update If your game is now broken, you may have to do a CLEAN install of both your GPU drivers and the game. And I personally recommend to install an earlier version, like 1.5, and patch it through offline patches.
It's what I've done since 1.03, my game is modded to the point where I have lost track of all the mods, and I have had zero issues with it. Am currently on patch 1.6, prescisely to avoid issues like this.
And this is probably the reason why the game is not working for me. My card is an Nvidia GTX 780, and before the patch (offered by GOG itself), the platform didn't put up any resistance. I didn't even assume someone would offer me something like this unless it was properly tested on these types of cards, and judging by what I read in other forums and people having the same problem this is probably a stumbling block.
I've tried installing the game in clean mode about 6 times with various combinations that probably don't even make sense to list, because they've taken so much time that I'm rather annoyed that I have to solve this problem and not someone else.
But objectively. If you know of a way to install a really just clean game I'd be happy to try it, I've failed at this point. I'd say I've spent probably more time with it than I would if I were going to work normally.
I have reinstalled and uninstalled drivers at least 5 times now.
I've tried just about everything. The game still simply won't start. Which makes it all the more depressing. I would most like to reclaim the game and get my money back for the ordeal, but I'm not that selfish, I just had the desire to play the game normally. So instead of relaxing on the weekend, I spend my time figuring out how to fix it.
I communicate with support, but it's useless and leads to virtually no results.
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I appreciate your interest.
Truegenesis