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Lecture 13: Global Illumination and Path Tracing (73)

I think this is an interesting case of 3-bounce path as the first leg of the ray actually bounces back towards the light source; intuitively, if we were to have a constant-intensity light source, wouldn't the effect just be as if the light bounces off the first sphere to the bottom left and thus be categorized as a 1-bounce path? And if so, would the original path from that direction be amplified since the light source wouldn't choose' a specific light path?

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