Now this is optimization: 256b.com features all sorts of 256 byte intros (all coded by hand in Assembler, probably) - amazing stuff, considering this is how big 256 bytes is:
1234567812345678123456781234567812345678123456781234567812345678
1234567812345678123456781234567812345678123456781234567812345678
1234567812345678123456781234567812345678123456781234567812345678
1234567812345678123456781234567812345678123456781234567812345678
Not a lot, but still enough to create a fire, water, tunnel, or 3d landscape effect. Some can even be interacted with using keyboard or mouse. [via hifidelity.org again]
Of doe ik iets verkeerd?
So...A Quake engine on a C64 is possible!
256 bytes = 2048 bits
pow(2,2048) = 3.231700607131100730071487668867e+616
possible programs..