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How does ray tracing work?

Ray tracing is a clever computer graphics technique that simulates how light behaves in the real world. Instead of just drawing what's visible, it traces individual light rays from your eye back to their source, calculating reflections, refractions, and shadows. This creates incredibly realistic images, a key feature of Nvidia's RTX cards mentioned with the RTX Spark product.

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Questions this opens up

What is a pixel? How do graphics cards work? What is real time rendering?

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