Yeah, the inside of a cylinder google results explain a lot in terms of lacking training data. If you google "O'Neill cylinder" you'll get what I was actually a

Yeah, the inside of a cylinder google results explain a lot in terms of lacking training data. If you google "O'Neill cylinder" you'll get what I was actually after originally, and the generators do badly there too, even though there are more examples (but still way too few). I think these kind of unusual requests will eventually need synthetic data, or possibly some way to give the model an "inner eye" by letting it build a 3d model of described scenes and "look at it", as there are lot of things like this that you can construct a mental idea of if you just work through it in your mind or draw it, but that most people won't have many conscious memories off unless you try to describe it in terms of something else. E.g. for the cylinder example, you get better results if you ask for a tunnel - which often can be "almost" a cylinder. But trying to then nudge it toward an O'Neill cylinder, and it fails to grasp the scale or that there isn't a single "down", and starts putting openings.