i kinda want to be able to turn off the poofs and just have distance fog. fred control to turn poofs on and off would actually allow for clouds. when you enter a cloud, poofs go back on, exit they go back off, possibly with some fade effect. problem is how would you model the clouds from the outside. rain could probibly be faked with a bunch of zero damage weapons being fired downward. with custom explosion effects you could make them look like they splatter when they hit your ship. you only need to spawn them in the area around the camera, then ramp the fog distances down to make the air denser and bluer while its raining.
distance fog could also be used with backgrounds to have a planets are there but the atmosphere is in between u and it.