Custom Map Makers

Tell me if I am reasoning correctly here.

For precipitation, we know that enablePrecip 0 is off, enablePrecip 1 is rain and enablePrecip 2 is snow. I would reason that there are two binary values here, one for rain and one for snow. So 00 is off, 01 is rain and 10 is snow. 11 should turn on rain and snow. Therefore enablePrecip 3 should be a wintry mix of rain and snow. Values higher than 3 would invoke a third binary value which would have unknown effects.

have you tested?

Just tested. enablePrecip 3 seems to just make snow.

enablePrecip is likely just an integer, not some kind of bitwise thing. Less than 1 equals off, 1 equals rain, greater than 1 equals snow (Most likely, you could test).

Blud is right.
Just take a look at _cs and _rs entity keys.

0 = none
1 = rain
2< = snow

For some crazy weather effects, You can use particle studio (it could be laggy though)