Ключевые слова: 3d illustration, 3d rendering, abstract, attenuation, background, cg, circle, circumference, concentration, concept, conceptual, concrete, confined, constrained, convergence, cramped, descending, descent, edge, enclosure, falling, fine, hole, illustration, mortar shaped, narrow, rendering, rigid, shrinking, slender, small, stairway, stiff, thin, uneasy,