You downloaded the file, good!

-As you can see it's .zip file and you probably know how to open it up, not gonna tell that-Then just go to the installation folder of Assetto Corsa (Google if you don't know how to do that)-You can extract it or just drag and drop it to folder-after that, doubleclick that .exe file. Command Prompt window opens up and patches the shadows*HINT* If you want those shadows back just doubleclick that .exe file again, it will revert that patchOKAY, done? Good!... You can now close all those windows and then open up the Assetto Corsa, go to race or benchmark or whatever, you will notice that there is no shadows.It may look bit weird at first, but low FPS is far more weird when driving than track without shadows.click those images to see them biggerOn my HD 4000 / i5 3320M / 8GB DDR3 RAM my game runs at ~35-40fps at 1080p on lowest settingss with smoke enabled, before this patch it ran at ~20-30 fpsMix and Match with other settings to make it run even betterThanks to lianju for making this mod and thanks to RaceDepartment for hosting awesome mod siteGood Luck in track