In somewhat of the same vibe as moralhardcandy, this earlier collab between blasphemy and purple is another gem. Released in 1998, it ranked 3rd at The Party, just behind State of Mind. 

An era-defining demo of the pure software rendering days. Lots of alpha layers, a clean design, beautiful colors, and an incredible IDM soundtrack. It's been a favorite of mine since its release in 1999.

A 7-minute techno live set created entirely in GLSL shaders that fits in just 64KB. Yes, 64kb. This WebGL intro by 0b5vr was submitted to the Revision 2023 demoscene competition. Procedural visuals meets algorave meets extreme compression. My mind is blown.