All of which fell under the general category of "plumbing"; it was the stuff that Richard had figured out very early in the project, the prerequisite for its being a self-sustaining business at all. He had become so fascinated by the gritty stuff, such as bothaviors of bellows-pumpers, that he had failed to pay enough attention to the features of the world that would be most obvious, and therefore most important, to the actual customers. Pluto’s world generation code was mind-blowingly awesome. Richard’s currency stabilization plan—once he’d hired a couple of people who knew about tensors—was worked out in better detail than such plans for real currencies. And the underlying code written by Nolan’s programmers to keep the whole system running was as well engineered as any in the industry. But for all that, they didn’t actually have a world. All Richard’s miners and horse archers and whatnot were just faceless manikins. T’Rain had no races, no cultures, no art and music, no history. No Heroes.