One good message - MP problem with ALS lights and shader effects in 2018.3.1.RC Win has been fixed. But tyresmoke property set to 1 first 30 seconds after simulation start is still here. Bad message - strange clouds rotation after long flight from W to E or E to W is present :
2018.3.1.RC on Win 7 is significant faster than 2018.2.1. Bravo developers !