The game engine has an odd bug that can sometimes cause potions to have -1 quantity, and there isn't a way to solve it if it first happens. Always close the game again, and restart it, so there isn't the screen with script compiling. Do not start a save or load a save after this has happened. VERY IMPORTANT: After installing new mods, the game will compile the new files. It essentially glues together the conflict files so it's just one file, and then there will not be a conflict.ītw, in Script Merger, don't merge XMLs. This can often be solved with Script Merger automatically. Unfortunately TW3 isn't very mod friendly, so if two mods affect the same file, the two mods will conflict. It will (usually) also correctly install mods with in-game menus, extra keybinds and the like.ĭo be aware of the point olnorton mentions about Script Merger tho. With a mod manager like that, you can easily turn mods on and off, or remove them entirely.
Most mods will be installed correctly, but do read the readme/description of the mods to make sure there aren't some unique steps you need to take. I'd say the easiest way to install mods is to use the Witcher 3 Mod Manager found here: