Which sketch shows three-dimensional relationships and depth as seen by the eye and is used when photographs would not be illustrative?

• A. Perspective Sketch - Three Dimensional
• B. Projection Sketch
• C. Legend
• D. Sketch

Answer: (A)

Depth and how the eye perceives three-dimensional space are captured most effectively by a perspective sketch. This approach uses cues like a horizon line, a vanishing point, and converging lines to create the illusion that objects closer are larger and those farther away shrink, mirroring real vision. It’s particularly useful when photographs wouldn’t be illustrative—perhaps due to angle limitations, lighting, or the need to convey overall spatial relationships and depth that a single photo can’t show. The other options don’t fit as well: a projection sketch emphasizes accurate measurements and 2D representations of 3D objects rather than natural depth cues; a legend is just a key for symbols and doesn’t depict space; a general sketch may be rough and fail to convey the precise depth and three-dimensional relationships that perspective provides.