If you want an accessible introduction to postscript that does a bunch of very pretty pictures you can't go wrong with: https://personal.math.ubc.ca/~cass/graph

If you want an accessible introduction to postscript that does a bunch of very pretty pictures you can't go wrong with: https://personal.math.ubc.ca/~cass/graphics/text/www/ https://personal.math.ubc.ca/~cass/graphics/text/www/ I particularly like chapter 14 where you implement 3d shader in postscript.