in the direction the eyes of a portrayed person are looking, or, when picturing a runner, adding white space in front of him rather than behind him to indicate movement. Studies with naive participants have confirmed this preference. Simplification Images with clutter can distract from the main elements within the picture and make it difficult to identify the subject. By decreasing the extraneous content, the viewer is more likely to focus on the primary objects. Clutter can also be reduced through the use of lighting, as the brighter areas of the image tend to draw the eye, as do lines, squares and colour. In painting, the artist may use less detailed and defined brushwork towards the edges of the picture. Removing the elements to the focus of the object, taking only the needed components. Shallow depth of field In photography, and also (via software simulation of real lens limitations) in 3D graphics, one approach to achieving simplification is to use a wide aperture when shooting to limit the depth of field. When used properly in the right setting, this technique can place everything that is not the subject of the photograph out of focus. A similar approach, given the right equipment, is to take advantage of the Scheimpflug principle to change the plane of focus. Geometry and symmetry Related to the rule of odds is the observation that triangles are an aesthetically pleasing implied shape within an image. In a canonically attractive face, the mouth and eyes fall within the corners of the area of an equilateral triangle. Paul Cézanne successfully used triangles in his compositions of still lifes. A triangular format creates a sense of stability and strength. Creating movement It is generally thought to be more pleasing to the viewer if the image encourages the eye to move around the image, rather than immediately fixating on a single place or no place in particular. Artists will often strive to avoid creating compositions that feel "static" or "flat" by incorporating movement into the image. In image A the 2 mountains are equally sized and positioned beside each other creating a very static and uninteresting image. In image B the mountains are differently sized and one is placed closer to the horizon, guiding the eye to move from one mountain to the other creating a more interesting and pleasing image. This also feels more natural because in nature objects are