Things You'll Need
Instructions
Open your image in Photoshop Lightroom and duplicate the image onto another layer by selecting ̶0;Layer̶1; and ̶0;Duplicate Layer.̶1; Select the duplicate layer by clicking on it.
Select ̶0;Filter,̶1; ̶0;Pixelate̶1; and ̶0;Mosaic̶1; and set the cell size to 13 squares. This number can be changed depending upon the size of your image and your preferences.
Change the ̶0;Blending Mode̶1; in the layers palette to ̶0;Multiply̶1; and change the ̶0;Opacity̶1; to 50 percent to complete your mosaic.