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What can cause a lost edge in a sketch?

Answer and explanation

Correct answer: Similar values of the object and background

The governing concept is tonal value contrast. A lost edge appears when the object and its background have nearly the same lightness or darkness, so the boundary visually merges and becomes difficult to locate. Thus option A is correct. A sharp pencil may create a definite line, while paper thickness and the object’s large size do not by themselves make an edge disappear. Comparing adjacent values is the best way to identify this effect.

Related tags

Lost EdgeTonal ValuesValue ContrastSketchingDrawing BasicsArt EducationClass 9 Mcq

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