[NTG-context] hatching an area without drawing its borders

Hi, I read the 2015 thread Hatch an area with Metapost (Metafun) and started playing with anglestriped. However in my maps I would like to get my shapes hatched with no borders drawn. How can I achieve it? path p; p := fullcircle scaled 50 randomized 5; draw p anglestriped (1,60,4); Damien Thiriet