A very interesting mod that is almost essential to have.    

Custom Shaders Patch or, more briefly, CSP is a program that allows, as the title says, to extend and improve the dynamics of lighting in Assetto corsa.

You can download it HERE from acstuff.ru and there are many versions, but, at the moment, the recommended version and the one I installed, is the 1.60 very stable and so far without problems.

The zipped installation file weighs 45 Mb and, after downloading it, just move it to Content Manager (page with Drive highlighted) with a drag & drop. Content Manager will take care of inserting the folders and files in their place.

You can check the installed version in Content Manager under SETTINGS . In this case 1.60

The contrast and brightness of the environments improve a lot and make the simulator more realistic. The most noticeable results are found in the light/shadow contrast and in low or high light environments. So watch cars speeding by at night on a dimly lit track or while entering or exiting a tunnel. There is also a clear improvement in shadows and reflections.

Conclusions

An excellent Mod that, together with the other SOL Mod, integrates Assetto Corsa in a more realistic way.