Do any of the different species in rtts have different atmospheric requirements? Would that affect them being in the same room?
One of the major conceits i made for RttS when i first started developing it was that all the aliens have to be able to live (comfortably enough) in the same spaces. So, nothing significant… ferrets are used to much lower oxygen environments than everyone else, but higher O2 concentrations don’t harm them. Ferret gas mixes feel kinda stuffy to everyone else though.