[Sharlin]

At least to me procedural generation is anything created by computer code (ie. a procedure) rather than a human artist. Typically geometry, textures, or music. Randomness is a useful tool for creating "natural" forms but by no means a required or defining feature. Size-restricted demos (eg. 64k, 4k, or 1k intros) are a great example of procedurally generated everything.

[a-nikolaev]

Demos are fine without randomness, but what we see here is an algorithm or a numerical method to make a mesh.