Tamer is right! When my sister had her device (cost 12,99€ in a local store, but was probably the exact same thing), it filled the entire kettle with a diameter of 30 cm. These foggers can be very efficient. I’m gonna buy one on ebay right now. Then I can tell you how efficient it actually is. I think it should be sufficient if you place a bowl of water next to your diorama. The depth should at least be 5 cm for the fogger to work properly. You could also look for a rectangular, thin beverage (e.g. 50x7x10cm) to place behind the Diorama. Make sure to secure the wall behind the diorama against the moisture. It would look most fantastic if you lifted the Dio up to the edge of the bowl. That way the fog leaves the baverage at the same level of the swamp.
If this is too much playing with water, I think a second layer of epoxy with some white/grey added will look awesome, too!
Or you could work with both. All I want to do is to inspire and throw in some ideas of mine. Don’t want to tell you what to do.
When I build such a diorama of Dahobah I’ll definitively incorporate at least one of those foggers.
Your project looks great so far!
- Philipp