See below. I use the original Jens' algorithm. Only changed the "pen size" formula, which now depends on 'brightness' value at each location of the pen.
Try sliding the value of 'who' slider in order to change a portrait being "size-pointilized" from Jens (1), to the 12years old Brian (2), to 12years old me (3), and to Saara, a girl from Finland, who in her video jokes about how spoken languages sound like to foreigners listening to them) (4)
