P99 Sky Graphics Revamp

[Axlrose]

The rain effects are very nice - an in-your-face feeling.

While it would not be ~classic~, would it be possible to randomly have during a thunderstorm a louder clap of thunder and longer flashes of lightning, as if the thick of the storm is directly above you. Perhaps if the storm is on a timer, it may or may not occur around the middle of the timer.

Perhaps a bit more wind sounds too if possible.

Thank you again for the great work!