Genesis Basics: Depth Layer In this layer we'll add depth to areas of thin skin.  Using straight pthalo blue, mix the paint to a VERY thin consistency, like water.  This layer must be done every bit as carefully as our purple wash; applying too dark will make our baby look bruised. Dampen the edge of a sponge with thinner, and dampen a brush with blue.  Blot off the excess on a paper towel. On the hands, add a hint of blue to the inner wrist, the center palm of the hand,  and the inner elbow and blend well.  Use the edge of the sponge to remove some paint if it appears too heavy.  I usually follow my vein lines with a little blue as well. (Photos show unblended paint.) On the legs, use the same process to add areas of thin skin behind the knee, on the inner and outer ankle, and the center bottom of the foot. On the head, add the blue tone behind the ears, under the lip, around the nose, between the eyes, on the eyelids, and on the temples.  Tread lightly here, especially on the areas between the eyes and around the nose. Check for any areas that are too blue and blend them out with thinner.  After you're satisfied with your details, it's time to bake again. The result of this step should be subtle, but when done correctly it adds a great deal of realism to your baby's skin tone.