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This portrait is only made with "flat circles" on a black background. Every circle has a single color, a single tone and a single size. I placed each circle one by one. It's a time consuming method. One week of intense work for this portrait. Please see some details and the work in progress here below. If you wish, you can also view this making of my portrait of Elvis Presley (video) to understand how I'm exploiting this technique with circles...
Some details:
