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Spherical Harmonic Lighting
A demo using spherical harmonics lighting. Not exactly a tutorial but contains lots of usefull information that can facilitate the understanding of some of the gritty details
Spherical Harmonical Lighting with OpenGL
A short tutorial on the essence of Spherical Harmonics Lighting and a demo application
Real-Time Per-Pixel Point Lights and Spot Lights in OpenGL
With the breakthroughs in features and performance of modern consumer graphics cards, the quality and realism of real-time computer graphics (most notably games) has increased at an astonishing rate. The latest set of features (introduced with the nVidia GeForce series) includes hardware transform and lighting (hardware T&L) and per-pixel lighting.