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Using Spherical Harmonics for IBL Probes

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Cheap Global Illumination – Half Lambert

Global Illumination is expensive if done in real-time and still no perfect solution exits, which lead us to use offline solutions using ray tracers ,etc. They take a lot of time to compute offline data to be used later during rendering.

If we don’t use any global illumination solution our scenes tend to become dark and many areas stay close to black. To solve the problem often people use Ambient Light which creates a Flat look and washes of the details of the mesh.

 

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