Features
– Textures of raindrops for windows and windshield have been changed, tries to appear colder and icy raindrops
– Increased amount of raindrops from inside the cabin (You can use the add-ons to increase)
– Better textures of the ‘exterior rain’, better transparency and shorter “lines”
– Better effects and behaviors of the drops on the windshield and windows, blurred, icy, and clammy vision
– Improved textures & effect for particles/spray of the wheels when the asphalt is wet (Truck player and AI Traffic)
– Dynamic exterior and interior rain sounds. Samples sounds, effects and transitions according to the intensity of the rain.
– High quality thunder sounds, Around 20 variety sounds, delay included between 1-5 seconds, simulating IRL.

The amount of raindrops on the windows will vary depending on the intensity and direction of the rain (controlled by the game or by a Weather mod)
Adaptation to 1.50.x by NMODs

Credits:
DarkCaptain – Adaptation by NMODs