Every 3D modelling software simply uses a series of flat polygons, small enough to appear curved, to created spheres etc. Why? Why can technology even today find it easier to render literally millions of little triangles, than just one curve?
In: Technology
Polygons come with depth and normal information, so you know what is in front or behind, and so you can take advantage of texturing and lightning effects in terms of how the algorithms are implemented.
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