(make sure to check 'Use this as default') oiv file, right click on it, go to 'Open with.->Select OpenIV' oiv archive and follow the on screen instructions It is strongly recommended to use the mod folder method. Includes an 8k, 4k, and 2k version to accommodate most PC set ups. This mod is intended to be used with uPrizZ's plugin, Rain Effects. I really wanted some HD raindrops on my vehicles, but I was tired of seeing high resolution raindrop texture mods with obvious tiling issues in game, so I decided to make my own textures.