Rain coming to AC

Peter Boese gives a very good and comprehensible guide in his manual for the gbW Suite 2.5.1.

You need the following mods:
1. Content Manager by Ilja Jusopov: https://assettocorsa.club/content-manager.html
2. Shaders Patch by Ilja Jusupov: https://drive.google.com/uc?id=12Y2QKNUUeFwIsyG9GYcNiJcaqEcZl4ir
3. gbW Suite 2.5.1 (with hotfix 06) by Peter Boese: https://www.racedepartment.com/downloads/good-and-bad-weather-suite.19484/
4. Wet Mod 1.7 by Alberto Fracasso: https://www.racedepartment.com/downloads/assetto-corsa-wet-mod-by-a-fracasso.22468/

You just need to select the wet track you want to drive/race on in your track selection screen and CM and Peter's files will do everything for you.
You don't have to copy any files by your own after downloading and "installing" (extracting) the four programmes/mods from above.

Edit: For "rain" on your windscreen you can either use Ilja's CM-inside app "ACC Ext Rain" (settings/assetto corsa/apps) or BLM Car 1.5.4 by Blamer (https://www.racedepartment.com/downloads/blm-car.23472/).

 

Thank you @Alistair McKinley that is exactly what I was hoping for.
I have been driving in the rain earlier, using the tracks from Alberto Fracasso, their is water spray, which is nice, but driving wet Goodwood or wet LA Canyon, no spray.

 

The wet mod uses the dirt effect to create spray, hence needing to add DIRT_ADDITIVE= to tarmac layers for tracks which don't come with the wet mod (where this is already done for you.)

Something that didn't cross my mind when I replied to you on RD is maybe you don't need to backup the surfaces.ini for these tracks that aren't included but could possibly add them to the track folder in the wet mod itself. I'm not sure if the tracks would need to be renamed though as there would be tracks in the wet mod folder and the normal tracks folder with the same name, I think all the vanilla wet mod tracks are already renamed with "wet" on the end to stop conflict with the Kunos versions. I guess someone could release an addon mod for wet mod with additional tracks that can be added to the wet mod tracks folder. The main one I am interested in is Goodwood but I don't know how to go about renaming a track so I will wait and hope someone else does it

 

Just follow Peter's manual which is included in the files you download from RaceDepartment.
He explains that you don't have to copy any weather file from the wet mods - just the track "layout" which goes into the assettocorsa/content/track/xy folder.

All the textures for rain are exchanged by CM and gbW Suite automatically. You don't have to worry about this.
That is why I love those 4 mods/programmes so much. You don't have to worry about anything once you have set up everything.

Speaking of the wet mod for LA Canyon: Just Kauser deleted his wet mod yesterday. Maybe because there were some problems with the file structure for CM. I just copied/extracted all the files manually into the Shaders Patch's folder and it worked/works.

To sum it up (and repeat myself): I just followed Peter's manual (his instructions on how to get everything to work) and everything works.

 

You are absolutely correct when using every thing from the list above, it all works, even the spray on LA canyon, actually with G&B suite rain weather all tracks have spray.
Quite remarkable, if only it was not so hard on FPS ( in VR), but that is an other subject for an other time.