Represent one more sphere:

Apply the earlier described method of texture representation. Fill the layer in black for the beginning and then create a new layer. Using the Rectangular Marquee Tool (M), represent the selection as a horizontal rectangle. Fill this selection with Paint Bucket Tool (G).

The rectangles repeat themselves, and are divided by white ones.

We’ve got the next result:

Get back to the model’s layer where we painted the lips. Create a new layer above this one and select the Soft Round brush.

Use this brush to paint on the model the spheres’ shadows. The brush’s color is #060D15 (set Opacity to 20% in Option bar).

Add on a sphere the neighbor’s shadow. In this case create a new layer and select the brush mentioned in the previous example of black color (Opacity – 20%).

Make a copy of the sphere now and process its sizes with the Free Transform (Ctrl+T) command, orientating it with the Object Rotate Tool (K). Situate it in the model’s mouth.

Insert the highlights on the spheres. Create a new layer and select for it the Soft Round brush of white color (Opacity – 30%).

We’ve got the next result:

Set the Blending mode for this layer to Overlay.

Make a copy of the last made layer (the highlights’ brightness is more accentuated).

Click Create new fill or adjustment layer from bottom part of the Layers panel and click to Curves to adjust the curve shape as shown to make a little color corrections.

We’ve got the next result:

Create a new layer and select the Hard Round brush to represent many small circles.

Apply a brush of different diameters, Hardness and Opacity values. The brush’s color is #3F8E8F.

Insert more circles on the new layer:

… and then apply the white brush on the next new layer:

Set the Blending mode for this layer to Overlay.

Combine in a group all the layers with the blue circles (press CTRL button to select the necessary layers and hold on the left mouse’s button while dragging the selected layers on Create a new group icon from bottom part of the Layers panel).

Make a copy of the got group and rasterize it (select the group in Layers panel and press CTRL+E to Merge Down). Place the rasterized layer under the very first group. Apply on the layer the next filter: Filter > Blur > Gaussian blur.

We’ve got the next result:

Set Fill to 19% for this layer.