A free mod for Witcher 3, by Murzinio.

This small mod from the developer of “Toussaint” adds the ability to enable sharpening for the game. If you’ve seen the screenshots, you’ll know that it’s a pretty powerful tool, so it’s enabled by default.

The only downside is that it seems to be disabled in the main menu, so you’ll have to add it manually. But it can be enabled by using a third-party mod or by simply editing the config file.

It can also be enabled for individual mods or even individual maps, so you can enjoy sharpening without having to turn it on for the whole game.