In this series i used a app called Pixelmator. In this app i discovered this style of using paint bucket to spread different colors across different peoples faces. The way i approached this is i would try not to completely distort the picture to the point where you couldn't tell who the person was, i was just add different colors. If i were going to develop this style more, I would try to use it on different objects like flowers and to other to try and challenge rather then just using peoples faces as my template.
