I keep singing that 'ReShade' song for quite some time now. Before that it was SweetFX and before that it was Boris' ENB Series. I did 'downsampling' way before 'Durante' came up with his DSFix and GeDoSaTo tool (which is now an integral part of Nvidia's Graphic Panel settings - they call it DSR = Dynamic Super Resolution).

I have no 'one' preset, I could share with you. The setting you see in this video was made by tinkering with the individual configuration files, after pushing the files and folder from the ReShade 'Mediator' GUI tool to the game folder.

What stands out (in a 'good' or 'bad' way, depending on what kind of person you are) the setting emphasize on the real-time rendering effect called "Screen Space Ambient Occlusion" (SSAO), casting a 'shadow'-compiling effect, giving 3D objects more plasticity. In combination with McFly's & Matso's Depth of Field effect AND a very high BOKEH effect ( a camera/photographic lens effect, making light sources in the background becoming 'out of focus' blobs of colored dots. Video games mimic such lens effect. It is massively used in the Unreal Engine 4 demos and in games like GTA V).

Btw, if you have a 3D monitor or Nvidia's 3D Vision glasses, Dark Souls and Dark Souls 2 look amazing in 3D!! Since the game is all about positioning and darkness, the stereoscopic 3D effect allows you to better 'see' where your character is and the range of your enemies. Think of miniature figurines you get to control with your gamepad.

If you don't have a 3D monitor or 3D glasses, you can still get a glimpse of the 3D effect with a pair of cheap red/cyan plastic glasses. It is called (color) anaglyph 3D and works just as well. The only downside is that all the colors are gone. But the effect still justifies it. Try it out?