Through approaches like z-buffering and occlusion culling, games have historically strived to minimize the number of spurious pixels rendered, as normally they do not contribute to the final frame.
While the internal representation of the game world is maintained as three dimensions, rasterization ultimately operates in two dimensions (the plane of the screen), with 3D primitives mapped onto it through transformation matrices.
3D Graphics is a Lieįor the last thirty years, almost all games have used the same general technique-rasterization-to render images on screen. To learn about the magic behind the curtain, keep reading.
If you just want to see what DirectX Raytracing can do for gaming, check out the videos from Epic, Futuremark and EA, SEED.
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