More Novel Uses forEnvironment Maps

Per-pixel specular normal mapping



• Assumes fancy per-pixel dot product operations!
• Cube map encodes normalized half-angle
  • Texgen supplies view vector
  • Cube map generates normalize(V+L) vector
• Another 2D texture supplies per-pixel surface normals
• Per-pixel specular lighting
• Per-pixel “normalized(V+L) dot N” !

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