Monday, August 26, 2013

What are Shaders?

Shading is the part of the rendering pipeline that gives each sample on a surface a value.  In the design of a rendering system, the shading system, also called the shading machinery, is called into play once the renderer discovers visible surfaces at each pixel on the rendered image. The shader is then invoked for the point on that corresponding to that pixel. How and why this surface is found is unimportant to the shader.
Shaders can not only modify the color of an object, they can also change the shape of an object. - Source: Visual Effects Handbook

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