Tuesday, June 28, 2011

ANATOMY- TRUNK

The strength of all figure drawing comes from a mixture of formal skill and anatomical knowledge. Understanding the human body, interior as well as exterior, is essential. Through out history many cultures have preoccupied themselves with depicting the human form. Western Civilization Art reached its investigative height during the Renaissance, also a coinciding focus of science and art. Below is an example of Leonardo DaVinci's Vitruvian Man. This is a clear demonstration of the need to make sense of the human form- in this case the perfection of human form and its relation to the perfect language of Geometry, the perfect circle and square. The figure is inscribed with its proportions measured and reach touching these shapes. Also note Leonardo's proportions for the figure using the measure of a head.

In 1747 we see the example of one of the most accurate representations of the human skeleton in the work of Bernard Siegfried Albinus- Corporis Humani. The following three examples are taken from Drawing Lessons from the Great Masters, Robert Beverly Hale. Here we see the human skeleton displayed not as static, but as if in motion. All bones and structures are presented in fine proportion, accuracy and rendering. Of specific interest is the TRUNK, or the area composed of the Cage and Pelvis. Please note the volume and form of each of these structures and how the artist represented them using line and value. Below is the Ventral position.

The Dorsal Position.

The Lateral Position.

The following four examples are taken from Human Anatomy for Artists by Andras Szunyoghy and Dr Gyorgy Feher. Below is an example focusing on the trunk. Note the relationship of the shapes, proportions, and location of the cage and pelvis. Also see how the top of the cage tapers and slips up into the shoulder girdle (a horizontal ring composed of the clavicles and scapula.) Notice the hollow in the pelvis as it completes the volume of the cage.


Below is an example of just the Cage (or Thorax.) It is important to note the volumetric shape of this structure (the space inside is loosely egg shaped). Again we see the taper at the top, and the opening at the bottom. All ribs radiate from the spinal column and MOST attach at the sternum, some being short arcs others being long loping arcs. It is important to note that these ribs are not cylindrical curves, but thick flat curves, and in most cases with flex joints (look just to the left and right of the sternum to see a plane shift at that junction.)


Below is the Dorsal View of the Cage. Here we see the spinal column and ribs reaching around to the front. Again we see a plane shift on these flat rib shapes- they are not round rings, but a segmented arc (think about breathing and how important it is for some flex to happen.)
In this and the last example note how the artist presented the sense of volume inside the cage, through the ribs we see the continuation of each rib but it recedes through value shift and line (possibly atmospheric perspective!)


Below we see the Dorsal trunk (back) focusing of the shoulder girdle. Note the shape and form of the scapula, where it lies on the cage, the angle at which it rises to meet the clavicle on the front.

Below is an example of the Pelvis take from The Human Figure, Jon H. Vanderpoel. Here we see a good description of contour line as it relates to the undulating form of the pelvis. Notice the butterfly shape of the structure and the hollows within. Important landmarks are the ilium crest (upper most point of the pelvis, the semicircular shapes) and the Ischium (rings at the bottom) and the Sacrum (on the backside the area around the Coccyx)

Here is an example of the Spinal Column (Human Anatomy for Artists) illustrating the three views and most importantly the gentle S- like curve. Notice the shapes of the vertebrae, cylindrical in front and wing protrusions in the back. Also observe the relative size of the vertebrae big to small top to bottom.
Another Example from John Vanderpoel illustrating the angles of these forms with the body. Note how and where they open and constrict on opposite sides.


Please take a moment to see Robert Beverly Hale give a lecture on basic anatomy.

Rib Cage 1

Rib Cage 2

FIGURE- BASIC CONSTRUCTION

Student Example

Plane- a flat or level surface (no elevations or depressions WITHIN). An area of a two-dimensional surface having determinate extension and spatial direction or position.

Spatial direction and position are important terms for us to consider. This allows the eye to read if a plane is sloped toward or away, what angle , and what the profile of the shape is. Joining of multiple planes begins to create form or the impression of three dimensions. A simple example is to think of a diamond (the precious stone) it has a form that is composed of a multitude of planes or facets. Drawing the human body can be approached this way, thinking of the three big masses (head, rib cage, pelvis) as blocks with cubic limbs extending. Gradually more and more subtle planes can be added making more complex transitions and form. It is best to WORK FROM BIG TO SMALL- the whole to the detail, the big body masses to smaller masses, etc. The following examples are all from Bridgman's Complete Guide to Drawing From Life. These are also presented in an order of process , more or less. Remember basic to more complex.
The 3 Masses of the body (Head, Rib Cage, and Pelvis) note how they are consider blocks (and their proportions) and their stacked position. The twist and bend are easy to see and describe as the relationship of these blocks turn or lean. Essential for carrying the basic movement of the figure.
Horizontal Axis of shoulders, pelvis, knees. This gives an understanding of where the balance is, how the body manages to distribute its weight evenly, and where the body opens or compresses etc.
Basic example of planes going up the back and side (almost two sided at its simplest).What is important to notice is the forward and backward slope as it moves upward or downward.
This is a good way to think about each body part, as a cross section. Is its mass similar to a cylinder, box or pyramid- round, square, triangle.
Further example of this shape of mass. Notice how the shapes alternate as they transition through a limb.
This example of the arm is interesting to see how planes can rise up and dip down as they meet another mass. To use Bridgman's term, they wedge together and interlock.
Planes of the leg from behind, notice how the planes begin to describe muscles.
The torso is a complex structure with a multitude of planes describing its surface. these planes all change as the torso twists and bends. Again we see the muscle groups beginning to be described by planes.

Student Example


Student Example

Student Example

CINEMATIC PERSPECTIVE

Below is some inspiration for our cinematic perspective drawing. At some point during the making of these movies, an artist had to create a perspective drawing for the Backdrop or CGI to be made. Our project is to do this process in reverse. We will learn from these created scenes and take them back to their beginning (their skeleton) by finding the horizon line, vanishing points, etc. and make a Perspective linear drawing.


Inception Trailer click here

Tron click here

Titanic click here

Star Wars

Alice in Wonderland

Raiders of the Lost Ark

Gladiator


Student Example- "Inception"

Student Example- "A Single Man"

Student Example


BASIC PERSPECTIVE

Perspective- a technique of depicting volumes and spatial relationships on a flat surface.

Linear Perspective - a mathematical system for representing three-dimensional objects and space on a two-dimensional surface by means of intersecting lines that are drawn vertically and horizontally and that radiate from one point(one-point perspective),two points (two-point perspective), or several points on a horizon line as perceived by a viewer imagined in an arbitrarily fixed position.

Atmospheric Perspective (or Aerial Perspective)- a technique of rendering depth or distance in painting or drawing by modifying the tone or hue and distinctness of objects perceived as receding from the picture plane, esp. by reducing distinctive local colors and contrasts of light and dark to a uniform light bluish-gray color.

Picture Plane- An imaginary "pane of glass" at which the viewers gaze meets the illusion created on the two dimensional surface. To extend the analogy, the viewer would trace on this glass the three- dimensional object. Not just the material surface, a concept.

Horizon Line- A level horizontal line located at eye level.

Vanishing Point- A point of convergence of parallel lines located on the Horizon Line.

Scale- The apparent size of an object.



This example illustrates the same object in relationship to the Horizon Line (Above and Below.) Notice whether you can see the top of the cube or the bottom, which way the diagonal lines slope to the vanishing point.

The following Four examples were taken from Basic Perspective Drawing- John Montague.





This example illustrates the top of a cylinder (circle) as it approaches the Horizon Line. Notice how it changes to an elipse and further squeezes to a line.


Piranesi- Prision Series

Rackstraw Downes

Al Held
Student Example

Student Example

POSITIVE AND NEGATIVE SPACE

While making a drawing or painting, it is of crucial importance that the artist consider all the space available. This space is comprised of both Positive and Negative Space. Positive space is what is consider a tangible object or the main subject in most cases. The Negative Space is the space that resides in between and around the Positive Space. Often when beginnings to make drawings, the student focuses exclusively on the Positive Space and all its details, leaving the negative space completely un- utilized. This is a tremendous amount of space that is not activated. Every square inch of the surface should be considered. Begin by thinking of your overall composition, are there interesting shapes around the perimeter of the subject? is this space interesting as it meets the edge of the page? are the interior shapes with the positive space active?
Student Example

Upon the activation of Negative Space, one realizes their are many ways to make a drawing. The drawing process no longer must begin with the pencil delineating shapes, but may begin with the eraser carving out negative space, or light within a composition. Think about it a little more sculpturally. One could have a block of shadow and slowly begin to carve out light and then add more darks etc. It does not have to be solely an additive process where I continually add and compile detail, I could begin by subtracting.
Student Example

Student Example

VALUE



Pontormo

Value is the relationships of lights and darks within an artwork.

Key terms:
Simultaneous Contrast- The area of darkest dark adjacent to the lightest light, thereby enhancing the power of the other. This area will draw the eye first and have the most force in an artwork visually.

Local Value- The actual overall value of the object (for example blue jeans are medium value, and a white cup is high value) Corresponding values within the object will relate to this (shadows will be darker in blue jeans versus the shadows in a white cup)

Halftone- The intermediary tones or middle values, not the highlights or darkest shadows. Think Light Halftones and Dark Halftones.

Halation- An effect of placing an opposite value in the background (negative space) adjacent to that value area of the subject (positive space).

Sfumato- A Leonardo Da Vinci term used to describe a blending of values in transition. The word has connotations of "Smoky" in Italian. "Without lines or borders in the maner of smoke, or beyond the focus plane"- Da Vinci

Chiaroscuro- A term broadly understood to describe the strong contrast in illumination between light and dark in an artwork. In Italian it translates to "light-dark". It also has a reference to light INdark.




Basic example of light falling across a form (light comes from the upper right). Consider the values from right to left: Highlight, Light Halftone, Dark Halftone, Shadow, Reflected Light, Shadow.
Seurat
Seurat
Seurat
R. Tweedy
Kathe Kollwitz
Kathe Kollwitz

Lopez

Robert Longo

Robert Longo

Student Example

Student Example