Experimental 4 Colour CMYK plot with each colour being built with a different conversion technique:
Yellow: fast marching method contours
Cyan: strips where lines bunch up in darker areas
Magenta: halftone dots made from spirals
Black: large spirals where multiple lines spread apart for darker areas
The pens are random fibre tip markers I found, they worked ok but the colours aren't really right. Also the pen shifted on yellow so there's a bit without enough colour
