Re: diffusion curves talk by Nikos Andronikos

May be. But, I dare to say, there is a better way to implement gradients which are "not linear nor radial". I explained it at SVG 2010- Fourier transform in SVG graphic, if I'm correct. Diffusion curves have some defects- their structure requires creation of objects, which are not present in original image- invisible contours. And their implementation requires lots of computation- authors of aforementioned technology recommend to use GPU. This option is not a must- Fourier transform can resolve large part of this issue.