If highlight on a cylinder is a straight band but object is curved what is the problem?

Correct answer: The highlight is not following the surface curvature

Correct answer: A — the highlight is not following the surface curvature. A cylinder is a rounded three-dimensional form. Light travels across its curved surface, so the highlight should relate to the turning of that surface and usually change gradually rather than appear as an unrelated flat strip. A perfectly straight band can make the cylinder look like a flat object with a pasted mark, weakening the sense of volume. A is correct because the highlight must be consistent with the form’s curvature and the direction of the light source. B is wrong because weak light changes brightness, not the basic requirement that the highlight respond to the surface. C is wrong because the question concerns the highlight, not the cast or core shadow. D is wrong because texture is a surface-quality issue and does not explain a geometrically misplaced highlight. The artist should observe the light family: highlight, middle tone, turning tone, and shadow should all support the cylindrical volume. Memory cue: highlights describe the surface; they do not ignore it.