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How can an edge be perceived between an object and background of similar value if only texture differs?

Answer and explanation

Correct answer: A change in texture can indicate the boundary

Edge perception does not depend only on a dark outline or a value difference. When the object and background have similar tonal values, a change in texture, stroke direction, density, or surface pattern can signal where one visual area ends and another begins. Thus option C is correct: the boundary may be perceived through texture contrast without adding an artificial black contour. Options A, B, and D are too absolute because neither a contour nor a cast shadow is always necessary.

Related tags

Pencil ShadingSimilar ValuesTexture ChangeEdge PerceptionContrastForm RenderingDrawing BasicsArt Education

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