A free mod for Witcher 3, by BlurredNotions.
This is an add-on for The Witcher 3 that aims to improve the game by making the physics for the game's NPCs and objects more realistic.
It works by changing the nodeMasses values inside the.w3dyng files. It definitely is a crude "solution" to the problem, but it works (I think).
The main thing that this mod is supposed to fix is that the game's NPCs have a very low-resolution texture that causes the game's physics to be a little off.
The main problem with the game's physics is that when an object is suspended in the air or dropped from a great height, the object will move in a way that the game's creator did not intend. This will cause problems for the game's players, such as when you try to fight against enemies that use a rope to hang on to you, the enemies will get a boost from the movement of the object and you will not be able to do anything to the enemies, even though you have a weapon that will instantly kill the enemy.
