7
Rendering Tonal Values
T chapter focuses on the principles that regulate how well acomposition of lines
his
and shapes conveys the illusionof athree-dimensional construction or spatial
environment on atwo-dimensional surface, be it asheet of paper, an illustration
board, or acomputer monitor. While lines are essential to the task of delineating
contour and shape, there are also visual qualities of light, texture, mass, and space
that cannot befully described by line