Well today I installed the Witcher 1 again, same PC but different monitor, 16:10 (1680x1050 reso) I got specifically this problem now:

Pixellated Characters During Conversations: Characters are pixellated / have blocky rendering during conversations and curscenes.

1) This seems to be caused by using a 16:10 widescreen resolution, and can be fixed by using a 16:9 resolution instead. If you have a 16:10 monitor, check your graphics card scaling options when switching to 16:9 so that it will run with black bars instead of stretching the screen.

From this thread
http://www.gog.com/forum/the_witcher/fixes_to_common_problems/page1

Any fix to that? I don't want to play the game on 1600x900 :/ or in latter box/"black bars"

thanks in advance :)

bump bump

The only fix I ever found was running the game in 16:9 resolution. I got used to it fairly quickly, you might give it a try and see if you can get used to it.

In fact, I prefer it now, because you actually see a little more on the screen, horizontally. I run the Witcher 2 in 16:9 as well.

thanks both of you for answering my question :) it's a shame that there's no real fix to the problem

If I remember correctly, setting shadows to low got rid of the problem, and I was able to keep the resolution at 1680x1050.
I don't think the loss of shadow quality was that bad.

I will try that, thanks :)

'
Please post back to tell us if this works. If it does, I'll add it as a possible solution in the sticky thread.

First 2 screens are with low shadows, the third one everything low, so it seems something in the setting fix the problem, I need to try one by one to know what it is...

Got it, if you put light quality to low the problem is gone.

I knew about lighting quality but I didn't consider putting lighting quality to low a solution, as the overall visual quality suffers from it.

I edited my sticky post to include setting lighting and / or shadows to low as a possible solution, with a note that these settings do lower the visual quality of the game.