Traditional Culture Encyclopedia - Weather forecast - How does dota2 turn maps into snow?

How does dota2 turn maps into snow?

The explanation of snow is: The weather? It is snowing.

When you enter. Dota picture turns to snow. It snows fast and slow.

Extension: Dota is not just for the weather.

The weather? After rain is input, it is rain.

The weather? After the moonlight is input. There is moonlight.

The weather? Wind input. The picture is windy.

The weather? After random input, the picture is random, and the state is changed every once in a while.

The weather? Turn it off? All weather will disappear after input.