Question Spreading Fog

Hello everybody,

i have some House in my Scene which shall be surrounded by ground Fog, the plan is when a Window or Door will be opened, the Fog shall "float" in the respective Room. When the Window or the Door will be closed again, the Fog shall dissapear after a short time.
The Fog shall also trigger a script when collide with the player.

At the moment i use Particlesystems around the houses but this is not really sattisfying as i will need a lot of them specially at all doors and windows.

Do you know the best solution to create this kind of spreading Fog.

Thanks to all !
Your help is much appreciated

 

That will have to be a custom coded fog solution that reacts to colliders, as theres no assets available that will create that (including particle effects), that ive seen. But there might be a way that ive not run into...

Seeing your post count, makes me think, this is way above your experience level...

 

Thanks for your Replay !
Then.. I take it as an challenge