In the Custom Shaders Patch Tab if you go to General Patch Settings, at the bottom right of the screen there is a drop down menu, select the Horizon Shades Preset. Then under Lighting FX set it to 100% brightness. In the Assetto Corsa tab go to Video and use the Horizon Shades Sky Post Processing Filter (in the drop down menu on the top right) or whatever one you want. Download the SOL Weather mod if you don't have it. I have resolution at 2560X1440 and everything on Maximum or Ultra but you can choose whatever resolution or settings you want based on what kind of PC you're using. You can adjust all of the graphics settings in the Custom Shaders Patch section or in the Video section. I spent about 2 hours testing all kinds of settings so just try a bunch of things and see what you like. I hope that helps