Furthermore, if you play with building interiors, you could have some building interiors contain generators, which cause the room to be a White Noise, or even Zero-G zone. Speaking of a Nimbus Zone, using weird scifi tesla coil type things you could have nimbus field generators, projecting a Nimbus Zone from the terrain piece.
You could even get away just using inexpensive drain caps from a hardware store to create these kind of vents. Can I come in just for Tea or Coffee and do I need to pay for the table Do you have toilets How long is a Gaming Session and what does it cost What. There are some companies which make great terrain to represent vents or cooling towers, while not impeding movement directly, you could say that the heat/exhaust produced by the vent causes the terrain piece to produce smoke (steam/smoke exhaust), white noise (plasma/nuclear exhaust), or both. Not all terrain needs to be purely analogous to natural environments, by focusing on what makes a sci-fi urban setting unique, you can come up with some easy to play terrain rules that add some unique flair to your table. Probably the most fun to come up with were some odd and unique types of terrain to add to the table. dice rolling tray with magnetic corners that close in, out, and upside-down High quality materials ensure your gaming table is protected, with strength to.