About
This fixes the warped/distorted projection of mirrors on the PC version of GTA IV, this issue usually occurred when the camera was brought close to the mirror.
I hex edited an exposed variable inside the mirror.fxc compiled shader and this fixed the mirror projection somehow. No idea what this variable did or stood for ¯\_(ツ)_/¯.

Installation
Contents: mirror.fxc for each win32_30_* folder

Supported patches: 1080* and 1040.

*The patch 1080 shaders should be compatible with post 1040 patches & the 2020 Complete Edition, but no guarantee for that.

Select the folder that matches with your version and paste the contents inside of it into your GTA IV folder.

As always, make sure you made a backup of the files you're about to replace.