but to "get' math in the concrete you absolutely have to understand how it a node or group of nodes responds to various inputs.  giving only a few samples (ex: here's stone with a roughness of 0.25, a variation of 0.5, and a vein of width = 0.1, color = white, density = 0.5) gives those who don't understand math less of an understanding of how things work, not more.  someone who's great at it will look at the nodes and know pretty much what's happening.  but those who are weakest at math need to see the graphs to get the whole continuum.  they need to see where it peaks, becomes 0, or

and gagnonrich specifically said, "don't present the graphs."