Merrifield's plate of four cylinders, one of them hollow, each with a darker vertical band just past the turn from light to shadow and a cast shadow on the ground.

Concept · Seeing Light

The Core Shadow

The core shadow is the darkest band on the form itself, just past the turn into shadow.

In Merrifield's first cylinder this "extreme dark" sits a little in from the edge, not at the outline.

  • Cross stressed careful drawing of "the dividing line of light and shade".
  • Under the same light, a soft core means a gentle curve and a crisp one a sharper turn.

Image: Internet Archive · Public domain (published before 1931)

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