Digital BW, The Print

> Are the shapes of the curves also configurable...or these predefined?

Predefined for most, configurable for the sadisitic.

Don't take that the wrong way.  I went to Corcoran School of Fine Art in Washington 
DC so I have a pretty personal take on The Artist having spent most of my life either 
as an artist, wanting to be an artist, promoting other artists, selling to artists and now 
helping artist expand their craft.

Generating your owns curves it sadistic but the only way to ensure that your art is 
yours and not out-of-the-box stuff.