Koroth: I have a question about the past processing settings because i wanna record the witcher 3 lets plays
There is a soft rendering and a sharp rendering whats better?
And what is Vignettierung and chromatic thingy?
And would you turn on depth of field or not

If u are german better read this cause my english sucks:

Hallo liebe GoG'ler ich hab ein paar Fragen bezüglich The Witcher 3 an euch
Wie findet ihr dieses Scharf zeichnen und Weich zeichnen und würdet ihr es an oder aus stellen
Und wie findet ihr Schärfentiefe?
Was ist eigentlich diese chromatische Abweichung und Vignettierung
Vielen Dank, Simeon

Runibl: My German is pretty much non-existent so English will do.

Most of the settings in Post Processing is very much personal preference.

A good place to compare settings is here (A Lot of images):
http://www.geforce.com/whats-new/guides/the-witcher-3-wild-hunt-graphics-performance-and-tweaking-guide

Sharpness: I prefer Low sharpness (High is too much for me). Although I like the effect High has on face texture and some others.

Vignette: Darkening of the corners. Often used in photography and cinematic effects in movies. I don't use this (Off).
Could be useful to set "Off" for recording, since viewers might see better, but the effect is not much.

Chromatic Aberration: Slight distortion effect, don't really see a lot of difference in imagery. Generally avoided at all costs in photography.
I have this set to Off.

Depth of Field: Very much a personal preference. I always have this set to Off. But many like the effect. Often used to get your attention to a specific point.

Also remember that these option can reduce your fps a little, so keep that in mind.

TBreaker20: Actually, the fps drop is minimal, if non existent. Nvidia already did a comparison.

Red_Eagle_LXIX: Minimal to non-existent on a pair of Titan X cards in SLI. Frankly I'd like to see a similar guide with some more reasonable hardware.

Better yet, while NVIDIA is mired in #kepplergate perhaps they should consider doing that same guide on a single 780.

PHiLiPZ_svk: TBreaker20: The chromatic aberration is a real life cameras flaw. It mostly happens when there are green and red objects in the scene, you will see the borders of the green objects somewhat distorted. In fact, it happens when there is too much contrast in the scene. Here is an example

Chromatic aberration doesn't need blue or red objects like your example so clearly demonstrated. It's mainly visible on edges where big difference of contrast is visible (branches are a great example). It's caused by the fact that white light is made from all of the other colors mixed together, each having a different wavelength thus also different refraction index on each air/glass interface in a lens. It's causing a Rainbow effect on edges.