Maybe more luck with http://mypaint.intilinux.com/ ? It has way more options for brushes than gimp. But I'm not sure for time dependent brush. Wow - MyPaint is amazing! The brush options are almost endless, and all sorts of things - including speed - can modulate other parameters. This might be wha...

Thanks for the replies, and especially the mapping matrix in the GIMP. I'll look at that. If that fails, I think I'll have to brush off my C skills and write some OpenGL code...

Hi all, I'm new to Inkscape, and I'm hoping I can use it to achieve an effect I'm looking for... I'd like to create an image which carries a single scribbled path. Not too hard, except that I'd like the brightness of the path to vary along the path in a time-regular way. In other words, I'd like to ...