Hello,
Sorry if this subject has been already discussed. The rain effect can be activated only when the level of precipitations raises to " heavy" in the x-plane weather settings. I am using NOAA plugin to generate real weather conditions, based on metar reports. In Europe, very often, we have only moderate precipitations (RA (rain) in the metar, not SHRA (shower rain). So, the rain effect cannot be displayed much of the time. I think it would be very nice if the rain effect could be tuned a little bit to have it displayed even if the precipitations are moderate (in the sense of XP settings).
By the way, any hour flying this bird makes me happy.