Thanks Peter for your explanation. Actualy I use pure weather script for with SOL planner 4.0, with extended physics for rain of course. And I have to say that with rainfx "override thickness" option I can change the grip level whatever the amount of wetness/puddle is in SOL planner. I can put the most intense rain with spray behind cars, if I put override thickness to 0 in rainfx the cars stick to the road like it's dry weather. And the contrary is true ie dry weather in sol, if I put rainfx override thickness to more than 4 or 5 the cars start to make some serious sliding.
So, because I find my moded cars slide to much by default in rain, I use override thickness in rainfx to 3 or 4. But if, for a race, I want weather changing, for exemple I set rain slot than dry slot in sol planner It's not handy to change the rainfx slider during this race, for the road grip to follow graphical weather conditions. So my question was: do you think it is possible to implement one day this "override thickness" to sol planner slot proprieties, so I can program different "override thickness (ie grip level) before the race, to follow weather planning ( for exemple rain, than dry, than rain).
I hope you understand my labourious explanation...