Visions are from the imaginative mind, sculpture can come from the found discards in nature, from sticks and stones and parts and pieces, assembled o… - David Smith

[S]culpture as a process of recognition.. .. in the great quiet of stopped machines -- the awe, the pull.. .Part is personal heritage.. .Since I've had identity, the desire to create excels over the desire to visit [the ancient sites and museums in Italy].

[learning European modern art by seeing it in the art-magazine 'w:Cahiers d'art'].. ..my heritage was all those things; [De Stijl, Constructivism, Cubism, Surrealism ] simultaneously, so I am all those things. I hope with a very strong intellectual regard for Cubism, and an admiration for it, because it was great at a particular time. It was both painting and sculpture. It was a great point of liberation in both painting and sculpture, and especially sculpture. [David Smith was one of the few sculptors in the art scene of American Abstract Expressionism ]

In particular, this question, to the sculptor:
If a drawing is traced, even with the greatest precision, from another drawing, you will perceive that the one is a copy. Although the differences may deviate less than half a hair, recognizable only by perceptual sensitivity, unanimously we rule the work of the intruder's hand as non-art.
But where is the line of true art—when the sculptor's process often introduces the hands of a plaster caster, the mold maker, the grinder and the polisher, and the patina applier, all these processes and foreign hands intruding deviations upon what was once the original work?