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This article lists common shading algorithms used in computer graphics. Interpolation techniques. These techniques can be combined with any illumination model:
Hatching (French: hachure) is an artistic technique used to create tonal or shading effects by drawing (or painting or scribing) closely spaced parallel lines.When lines are placed at an angle to one another, it is called cross-hatching.
Shading refers to the depiction of depth perception in 3D models (within the field of 3D computer graphics) or illustrations (in visual art) by varying the level of darkness. [1] Shading tries to approximate local behavior of light on the object's surface and is not to be confused with techniques of adding shadows, such as shadow mapping or ...
The majority of NPR techniques applied to 3D geometry are intended to make the scene appear two-dimensional. NPR techniques for 3D images include cel shading and Gooch shading. Many methods can be used to draw stylized outlines and strokes from 3D models, including occluding contours and Suggestive contours. [6]
Analog photography is limited by the materials and equipment used by the photographer to capture gradation. These constraints are eliminated in digital photography, where software can be used to manipulate photograph images to create gradation. [4] A photograph emphasizing gradation in the colour of autumn leaves in Yokoami, Tokyo, Japan.
The conventions and techniques of using oils demands a knowledge of drawing and painting, so it is often used in professional practice. When hand-colouring with oils, the approach is more often to use the photographic image simply as a base for a painted image.
Oblique projection is a simple type of technical drawing of graphical projection used for producing two-dimensional (2D) images of three-dimensional (3D) objects. The objects are not in perspective and so do not correspond to any view of an object that can be obtained in practice, but the technique yields somewhat convincing and useful results.
Different techniques can be used to create physical texture, which allows qualities of visual art to be seen and felt. This can include surfaces such as metal, sand, and wood. Optical texture is when the illusion of physical texture is created. Photography, paintings, and drawings use visual texture to create a more realistic appearance. [5]
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