I've seen a lot of view effects uploads, but the best 1 is the dynamic which comes with the game, only needs a little tweaking, which i did, twice. Improving the Darkness that seems to haunt that view (my personal favorite is dynamic 3)
1. Open AssettoCorsa/cfg/filters
2. unzip, Copy & Paste both files in the filters folder.
(they will not overwrite any files) start up game & use the normal Post Filter App to select new views. Enjoy!