Of all the variations of locomotives I’ve had rendered for me lately, this one looks the most feasible.
Prompt:in a convention center, parked in a display booth is a half-scale locomotive made of brightly colored, mismatched parts 3d printed and fit together like a puzzle. it has the headlight lit up, and smoke billowing from the smokestack. people are gathered around admiring the awesomeness of the locomotive
Other iterations
Well…you could parallelize it. Get lots of 3d printers running side-by-side making components.