4.3: Concepts in Value Drawing
- Page ID
- 341493
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\(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf q}\) \(\newcommand{\svec}{\mathbf s}\) \(\newcommand{\tvec}{\mathbf t}\) \(\newcommand{\uvec}{\mathbf u}\) \(\newcommand{\vvec}{\mathbf v}\) \(\newcommand{\wvec}{\mathbf w}\) \(\newcommand{\xvec}{\mathbf x}\) \(\newcommand{\yvec}{\mathbf y}\) \(\newcommand{\zvec}{\mathbf z}\) \(\newcommand{\rvec}{\mathbf r}\) \(\newcommand{\mvec}{\mathbf m}\) \(\newcommand{\zerovec}{\mathbf 0}\) \(\newcommand{\onevec}{\mathbf 1}\) \(\newcommand{\real}{\mathbb R}\) \(\newcommand{\twovec}[2]{\left[\begin{array}{r}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\ctwovec}[2]{\left[\begin{array}{c}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\threevec}[3]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\cthreevec}[3]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\fourvec}[4]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\cfourvec}[4]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\fivevec}[5]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\cfivevec}[5]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\mattwo}[4]{\left[\begin{array}{rr}#1 \amp #2 \\ #3 \amp #4 \\ \end{array}\right]}\) \(\newcommand{\laspan}[1]{\text{Span}\{#1\}}\) \(\newcommand{\bcal}{\cal B}\) \(\newcommand{\ccal}{\cal C}\) \(\newcommand{\scal}{\cal S}\) \(\newcommand{\wcal}{\cal W}\) \(\newcommand{\ecal}{\cal E}\) \(\newcommand{\coords}[2]{\left\{#1\right\}_{#2}}\) \(\newcommand{\gray}[1]{\color{gray}{#1}}\) \(\newcommand{\lgray}[1]{\color{lightgray}{#1}}\) \(\newcommand{\rank}{\operatorname{rank}}\) \(\newcommand{\row}{\text{Row}}\) \(\newcommand{\col}{\text{Col}}\) \(\renewcommand{\row}{\text{Row}}\) \(\newcommand{\nul}{\text{Nul}}\) \(\newcommand{\var}{\text{Var}}\) \(\newcommand{\corr}{\text{corr}}\) \(\newcommand{\len}[1]{\left|#1\right|}\) \(\newcommand{\bbar}{\overline{\bvec}}\) \(\newcommand{\bhat}{\widehat{\bvec}}\) \(\newcommand{\bperp}{\bvec^\perp}\) \(\newcommand{\xhat}{\widehat{\xvec}}\) \(\newcommand{\vhat}{\widehat{\vvec}}\) \(\newcommand{\uhat}{\widehat{\uvec}}\) \(\newcommand{\what}{\widehat{\wvec}}\) \(\newcommand{\Sighat}{\widehat{\Sigma}}\) \(\newcommand{\lt}{<}\) \(\newcommand{\gt}{>}\) \(\newcommand{\amp}{&}\) \(\definecolor{fillinmathshade}{gray}{0.9}\)Value drawing is an art technique that uses shades of gray to show depth and realism. It includes understanding how light and dark areas (highlights and shadows) reveal an object's shape and where light comes from. It also involves how light bounces off or passes through objects (reflection, refraction, transparency, and translucency) and how colors can feel warm or cool, affecting the drawing's mood. These elements help artists create drawings that look real and evoke emotions.
Highlights and Shadow
Highlights are areas where the light directly hits the surface of an object, while shadows are areas where light is obstructed on the same object.
• Application in Art: By accurately placing highlights and shadows, artists can create a convincing sense of three-dimensionality. For example, in a portrait, correctly rendered shadows under the chin or along the nose can significantly enhance the realistic appearance of the subject.
• Examples: Franciso Goya’s works are known for their dramatic use of light and shadow, showcasing this technique exquisitely.
Reflection and Refraction
Reflection occurs when light bounces off a surface, and refraction occurs when light passes through a transparent medium and bends.
• Application in Art: These phenomena can depict surfaces like water, glass, or polished metal, adding realism and depth. Artists must observe and replicate how light behaves in these contexts to portray such materials convincingly.
• Examples: The reflective surfaces in Jan van Eyck’s "Arnolfini Portrait" demonstrate the masterful use of reflection in art.
Transparency and Translucency
Transparency allows light to pass through an object without scattering, whereas translucency scatters the light as it passes through.
• Application in Art: Depicting transparent and translucent materials requires a nuanced understanding of how light interacts with these substances. For instance, depicting a sheer curtain or a frosted glass window requires different approaches to convey their respective qualities.
• Examples: The transparent and translucent fabrics in John Singer's paintings illustrate these concepts' subtle yet impactful use.
Color Temperature and Ambient Light
Color temperature refers to the warmth or coolness of light, while ambient light is the general illumination present in a scene.
• Application in Art: Artists use color temperature to create mood, atmosphere, and ambient light to establish the overall tone of the drawing. A scene bathed in the golden hues of a sunset will evoke a different feeling than one under the cool moonlight.
• Examples: J.M.W. Turner's works, particularly his seascapes, often employ varied color temperatures to create dynamic and emotionally charged scenes.