[robert00700]

I wonder if one could construct a metric for how 'interesting' a drawing is- then throw it at a genetic algorithm? I'm guessing most likely the system is inherently unstable, so two 'interesting' parents don't necessarily create 'interesting' offspring

[tachyonbeam]

You don't have to use crossover, you can just make small mutations. That's much more likely to result in interesting offspring.