Depending of the graphical config the norainzones work in different way. Config 1: There is rain inside the tunnel From the tunnel to the pit entry, there is only rain in the upper part, like if you were in a norainzone. Config 2: There is no rain inside the tunnel From the tunnel to the pit entry, there is only rain in the upper part, like if you were in a norainzone. And the whole asphalt of the circuit is wet.