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1. Ray tracing intuition | Rendering | Computer animation | Khan Academy

An intuitive walkthrough of the core idea behind ray tracing: instead of simulating every photon leaving a light source, trace rays from the camera into the scene. Explains why this shortcut makes computer graphics computationally feasible.

Khan Academy Labs · 2 min · Advanced · VFX · VFX · 2016

What you take away

Explain why ray tracing works backwards from the camera rather than forwards from the light.

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