Different shading methods with pencils shading in kirvat or arches straight shading or 45 degree angle shading in a circular way secrets of realism in | Ebert-Schifferer, p |
---|---|
Ebert-Schifferer, p | 39, 53• Lucie-Smith, Edward 1984 |
Ebert-Schifferer, p.
London: Thames and Hudson | Ebert-Schifferer, p |
---|---|
Book XXXV | Langmuir, 13—14• sur larousse |
.