A weather chip
I understand it would be difficult to introduce weather into the game. Nonetheless, I would like to see the inclusion of weather chips. We already have a skydome chip, a background objects chip, and other chips to contribute to the mood of a room. Why not weather? Just imagine the beautiful scenery you could make. A gorgeous mountain with it snowing on top, or a swamp in the middle of a rainstorm. It just adds more life and characters. At the least, it would be cool to have more options for the emitter, for example, rain, snow, etc.