Advanced Shading Techniques

Gloss Mapping



• Want per-pixel specular exponent?
  • Wet surfaces, clouds, eroded surfaces, etc...
• Can get similar effect using gloss map
• Texture modulates specular contribution
• Apply diffuse light first (0,0,0 specular)
• Then add in specular lighting (0,0,0 diffuse) modulated by a one-component texture (e.g. GL_ALPHA)

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