Originally posted by Zaei
If that is the heaven 7 demo, it is a realtime raytracer, written in assembly. Probably 90% of the geometry is procedural (generated using mathematical formuli), and the rest (sound, any non prcedural geometry, etc) is compressed, perhaps with wavelet compression. Although, in comparison, The Product takes the cake on compression. That demo generates/stores ~1.9 gigabytes (yes, gigabytes) of data, into 64K. Anyway, yes, it's amazing, but certainly possible =).

Z.
i saw that one too let me find the link..