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Most artists use a ruler and vanishing points. Kim Jung Gi drew fish-eye, 3-point, and worm’s-eye perspectives freehand. His sketchbooks are filled with "impossible" angles that look mathematically perfect. Studying these pages teaches you to feel perspective intuitively.
While many fans search for a , it is important to note that the late master artist and his studio, SuperAni, primarily released his massive sketch collections in physical hardcover formats . Official digital PDF versions are generally not offered for commercial sale to preserve the tactile quality and massive scale of his work, which often spans hundreds or even 1,000 pages per volume. The Challenge of Finding a Legitimate PDF