Phong shading smoothes the edges between faces and renders highlights realistically for shiny, regular surfaces. This shader interpolates intensities across a face based on the averaged face normals of adjacent faces. It calculates the normal for every pixel of the face.
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Material Editor > Standard Material > Shader Basic Parameters rollout > Choose Phong from the drop-down list.
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Material Editor > Raytrace Material > Raytrace Basic Parameters rollout > Shading drop-down list > Choose Phong.
Phong-shaded highlights are typically less regular than Blinn highlights.
Phong shading can accurately render bump, opacity, shininess, specular, and reflection maps.
The Blinn and Phong shaders have the same basic parameters.