For the "water spray" or any other particles to appear in large quantities the traction has to be closer to "1". When you go "0.709" in "surfaces.ini" this causes the particles to disappear... It`s a paradox in the game. And another thing - the rain grip is around "0.88". Yours feels more like packed fresh snow.
The grip depends a lot on what kind of car you drive in ac and apart from having multiple versions it is impossible to get the grip right for all cars. Some cars like gt3 tend to be too slippery whereas mx5 is too grippy. As for the actual grip I adjusted the grip levels based on estimated lap time difference between wet and dry and used real life lap times as reference. For reference in bathurst the lap time was around 2:03.4 in the dry and 2:27.7 in the wet. In relative terms this is about 0.84 ratio when you compare dry to wet lap times. In other words the lap time in the dry is about 16% faster/lower. This correlates well with horsma in most cars except gt3. Ferrari 458 is 0.852 and the lola mod car is 0.819. Z4 gt3 is 0.625 and miata is 0.938. Ultra high downforce cars like f1 and lmp1 are probably even worse.
My approach to finding what "FRICTION=" is a wet track was much the same. Did it when adjusting the data for the Top Gear`s "Suzuki Liana". In the end it was the 0.88 friction that gave the closest match for lap times between 0.98 for dry Dunsfold and wet. Of course for consistency I used the AI driver enabling it by "ctrl+c" for every test run.
No. That is not physics variable. It`s visuals only. And for comparison take a look at Fracasso`s wet mod, Godwood and every other wet layout. Spray depends on DIRT_ADDITIVE mostly. And it matters if CSP and Sol are enabled, and if CM uses custom weather particles or not.
It makes the tires dirty which reduces grip so it is very much a physics value
. Spray should come from shaders patch or SOL rain weather but I'd guess the low friction breaks that effect like you said.I got curious about it and just did a test. On a "Suspension Test Track" used the flat clean surface in a FWD car to get a reading for sustained max lat "G" and then changed the dirt to "1". The lat "G" went down by 12%. You are right
Brief and hopefully useful input on that from me - the AI dev app is assuring enough that training the robot to use the car in particular way is going to be repeated exactly the same in all conditions. Same slip angles, braking and gear changes, everything to the level of training. Because of that the overall "off pace" as a measure is constant in all conditions and is good for testing the track after the AI is trained not to crash.
It's win-win if the smoother repaves are there as optional layouts - people can take it or leave it. Can't see any downside to this mate. Crack on!
I find the current surface on par with KS`s "Spa" and "Nurburgring/Nordsleife" and got used to drive with loose grip on the steering to allow for the jerky movement and have my fun even in F1 cars. If you add more variety with smoother mesh you are welcome but I don`t have second thoughts about the current track. It`s good.
Recently I dug up a way of practically reaching as low as 76.5 % grip on the track and spray. It can be done if in one of Sol`s wet weathers the file "tyre_smoke.lua" gets edited to read
local smoke_settings = get__Tyre_smoke_grass(true, 1)
