Is there any way to make it rain on one map level? I'm thinking of a game set in a thunderstorm, but only on the first map.
You could make an animated texture that is transparent and import it as a wall tile. Then place the wall on floor 2, floor3, etc. Here is a gif as an example:
The only problem is the wall tile will show the animation on the bottom of the tile. I have tried making a custom modifier and disabling the 'Always cap top and bottom' but this results in a bug where the animation is not played.
where is the particles system? only particles i know of are blood and sparks.
although now that i think of it, it might be possible with finite state machine to create an invisible enemy with a custom blood sprite as rain but it would be super jank.
other thing i was thinking might work is create a shader and activate it by script.