Step 11: Create the eyes.
For the eyes, use this four-step process, shown in Figure 16. First, paint in the main color of the eye on a separate layer with a blending mode of Multiply. Then, on a new layer paint a brighter version of that color around the sides and base of the eye. Set this layer's blending mode to Overlay. Make another layer and set its mode to Multiply. Now, paint a dark edge around the eye. Lastly, make a layer for the highlights. Leave this layer's blending mode set at Normal and then paint in a few specks of white.

Figure 16

Step 12: Add color to the background.
When creating portraits, the background the image is placed on can help to tie together all of the colors in your image. So, rather than leaving the background scribbles a solid color, you can incorporate all of the colors from your palette into it. To do so, make a new layer and paint random blotches of color around your illustration, as shown in Figure 17. Then, change the layer's blending mode to Overlay, making the colors gently wash over your original strokes, as shown in Figure 18.

Figure 17

Figure 18

Step 13: Enhance the color of your image.
Now, save a flattened version of your illustration. At this point, you can use this as your finished piece or you can add a few final touches. To deepen the colors of your portrait, copy the layer containing your flattened image in the Layers palette. Then, change the layer's blending mode to Multiply. Now, make a layer mask and paint out any areas that you don't want darkened, as shown in Figure 19.

Figure 19

Step 14: Add texture.
Finally, to give your portrait a more illustrious feel, you can apply a canvas texture to the final image, as shown in Figure 20. Flatten your image. Next, choose Filter > Artistic > Rough Pastels. Select Burlap from the Texture pop-up menu and adjust the other settings to your liking. Then, click OK. That's all there is to it.

Figure 20