How would I achieve this effect?

>>300456
it doesn't seem like a regular pattern, if i had to do it i'll probably import the portrait photo onto illustrator - lower the opacity- set a grid/guides for half of her face specially where her features are (cheekbones, nose bridge etc) and then just start playing playing around with the diamon/rectangles patterns using offset path and ctrl+d, most of them seem to be repeated up and down so you'll only have to a small part.after that just lower the opacity and add noice/grain.

>>300457
this p. much
all you really have to know is that indeed, it is not a regular pattern