I love the shades of dark colors and the contrast of the medieval movies of the 80s.
Highlander, Excalibur, Conan, Krull, Clash of the Titans etc ...
I created this reshade based on this.
the work is at the beginning and I intend to make this reshade as close as possible. 
so expect to see grain, contrast, intense colors and dark colors.

Install...
Download the last version of Reshade ( https://reshade.me/ )
Run "ReShade Setup" as administrator click select game specify the witcher3.exe, select 3D10 + option
Extract Medieval80s.rar into The Witcher 3\bin\x64
After the game started, press Shift + F2 to open the menu. Follow the tutorial and read carefully
Select the preset "Medieval V1.0", click on table "Settings" in "RESHADE_DEPTH_INPUT_IS_REVERSED=0" change this value =0 to =1
Done.



pls watch in 4k >



For best results i use and recommend this mods:
The Witcher 3 HD Reworked Project by Halk Hogan PL
Realistic Contrast Textures by Jack3459
Wiedzmin Lighting Mod by Mishikedman
Darker Nights by shaedhen  
Tweaks by TookaFace 
Immersive Cam by KCS 
New Katana Swords(fudoumyouou yotohatamonba) by CaptTylor