Some questions about Particle System 

- I have a few scenes where it snows. Is it possible to do so when the scene is loaded the snow is already fully visible? 
In this way I would avoid the loading time of the particles in the scene making everything more realistic. 
The new function ' warmup ' allows this? 
- Can I assign a particle at multiple scenes to be loaded once? 
- Is it possible to create a random system of particles? 
   For example, every 10 minutes of the game make it rain and then after 10 minutes stop the rain? 
So many questions I know  
