Left 4 Dead 2 - Weather System

Author's notes:

• Rain looks better on dark maps: the author noticed that the brighter the lighting, the worse it looks.
• There is no configuration file yet, so the rain is completely random.
• There is a rare variant of a storm (NOT just heavy rain, but a real hurricane).
• The sound changes depending on whether you are indoors or outdoors.
• Glow effect (bloom) in L4D2 style.
• Rain particles from L4D2.
• Random intensity.
• The rain is very loud.
• The height of the rain is not set perfectly, so under very high roofs (for example, on the Construct map) the rain will still be visible.
• It is unknown whether it works in multiplayer.

If you want to check in the game, there are simple console commands: "rain_test" "rain_test_storm" "rain_test_stop"

The author warns that bugs are possible.