Key features:
- Add new texture and significantly increase number of raindrops.
- Improve physical behaviour of particles, now their spawn will be more affected by truck position relatively to rain inclination.
It makes a huge difference and vastly improve perception of weather! Just try it yourself!
- Reworked sound effects for wipers and rain
- New car splash trails
- Detailed description of config parameters in \def\vehicle\interior_glass_config.sii in case you want to play around with the settings yourself

Tweak these sliders to achieve comfortable sound level:
Rain inside - Truck effects volume
Rain outisde - World sounds volume
Wipers - Interior sounds volume

Credits
Avelium