https://wccftech.com/the-witcher-3-nintendo-switch-mod-graphics-options/

We have seen plenty of mods developed for The Witcher 3 on PC, and we definitely didn't expect to see one get developed for the recently released Nintendo Switch version. This mod is very welcome, as it makes the game look somewhat better.

The new mod allows players to access some additional graphics setting directly from the game's menus. These settings include the ability to turn motion blur, bloom, depth of field, light shafts, sharpening, and anti-aliasing on or off.