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Ambient light is the available light surrounding the geometry. By itself, ambient light makes a 3D object look like a 2D object. The addition of diffuse and specular light adds the contrast and depth needed to define 3D geometry.
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Diffuse light is directional and spreads out over the object, like a flashlight shining on a sphere. This generally adds contrast and depth of field to 3D objects.
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Specular light is directional and reflects off the surface of a sphere or curve in a geometry. It is based on the angle between the viewer and the light source.
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For 3D models, you can also add these light source nodes — Directional Light (), Point Light (), Spotlight (), and Headlight () — to adjust how the color and shading displays in the Graphics window. Each View can have a maximum of eight light sources (nodes) in any combination. See Directional Light, Point Light, Spotlight, and Headlight below.
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