Mosaic effect without filters - part 1

1. Open an image of any size preferably of lots of colors. Duplicate the image layer (Layer > Duplicate Layer) and select the duplicate layer.

2. Using Pen tool select a portion of hair and paste it on new layer and name it, say, hair.

3. Click on layer named hair. Now we are going to make cracks that will make up the mosaic. Add a shadow to this layer. Layer > Layer style > Drop Shadow.

I have used these settings

After this go to Layer > Layer style > Bevel and Emboss and Use these settings

Select the Eraser tool and choose a 3 pixel round brush and delete in a tile-shaped pattern. (regular or irregular polygon shape. I prefer irregular polygon for the true mosaic effect). Now the picture should look some what like this.