Carlson's Guide to Landscape Painting
by John F. Carlson · Dover Publications
Explains the underlying logic of outdoor subjects: the four planes of nature and their consequent values, aerial and linear perspective, tree structure, unity of tone, and memory work. The angle-to-value system (sky, ground, slanting, upright planes) is the single most transferable mental model for landscape work, and it applies identically to graphite as to paint. Dover reprint of the 1929 text with 58 diagrams.
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