Putting complex images through the vectoriser (Autotrace) and back can result in some weeeeeiird effects. Here's a panel from tomorrow's (Wednesday's) ROCR comic:

And no, I'm not afraid of spoiling anything here. The effect is even cooler at the size this image was originally exported at:

And this one looks cute too:

I'll have to use this style somewhere. I'll have to remember to feed the vectoriser images without word balloons and text (which I'll have to add later) though.
