Sizecoding
The art of fitting image, music and motion into a few kilobytes — or a few hundred bytes — of code.
Sizecoding is the demoscene's discipline of making the most of the least space. The compo categories set the ceiling: 64k intro, 4k intro, down to 256 and 64 bytes. Everything must fit — code, graphics, music — so nothing is stored; it is computed. Textures become mathematical formulas, the music a tiny synthesizer, and the final file is crushed through a packer.
On modern machines it is usually driven by a pixel shader that draws the whole scene per frame, while the surrounding code is counted byte by byte. The result is a paradox the scene loves: fifteen seconds of audiovisual excess from a file smaller than a single icon.