- Uninstall Diablo
- Download Diablo from Battle.NET (https://us.battle.net/account/management/)
- Revert 1.14 to 1.13 by extracting the zip from http://tsw.median-xl.com/join.php into your Diablo folder (C:\Program Files (x86)\Diablo II)
- Extract the Median XL 2017 files from https://get.median-xl.com/ to your Diablo folder
- Right-click on "Game.exe" within your Diablo folder -> "Properties" -> "Compatibility" -> Turn on Windows XP compatibility, also turn on "Disable visual themes", "Disable desktop composition" and "Disable display scaling...". Otherwise Diablo will take forever to load.
- Start Median XL 2017 by clicking on "Game.exe"
- Now every time you encounter graphic glitches Alt+Tab to desktop -> right-click -> "Screen resolution" -> Don't do anything inside the screen resolution window instead simly Alt+Tab back to the game. This should fix the graphic glitches. You might have to do this once for every new act.