I've been getting into the 40k Tau lately. At the moment I'm very tempted to design some 6mm scale buildings for them and see where I can get them cast/sold/whatever.
However, as I started delving into their background, I found this lovely page in which it's theorized that the Tau are possible some Iron Men offshoot. This made me wonder: did the Machines experiment with creating their own lifeforms? I mean, the Mars Accord is purely between machines and humans, and the machines actively wipe out 'alien threats', but what about their own creations? Would they at a certain point form treaties with them as well? Or would they maintain some sort of 'property relation'?
It kinda makes me wonder: if the machines seeded worlds with lifeforms besides humans, would these races be kept isolated from the humans? And also, would such races be able to 'escape' from the machines?