START ADDING THE MAIN FEATURES
OUTLINING THE EYES
Drop the opacity of the highlights and the figure layers. Create a new features layer in the layer panel and move it above the highlights layer.
Specifics About the Eye:
Make the eyes the darkest value. Remember that the eyes have depth, so add shadows to the inner top of the eyes. Like blocking out the light, really try to pick apart the where the values are in the image and separate the values into shapes. Add in a light point to give the eye a bit of a glisten, make sure you add it on the same side as the other eye.
ADDING THE EYEBROWS
Put in the eyebrows using the darkest color.
Put a jagged edge on the inner part of the eyebrows to give it hair texture. You do not have to get too detailed with the eyebrows, try to keep the shapes fairly basic.
PUTTING IN THE MASK
Here is where the you would put the nose and mouth in if you are not using a mask reference.
Put in the basic shape of the mask.
Lower the opacity of the mask shape and add in the lights in the mask.
Turn the opacity back up for all the layers and fix and spots that are overlapping weirdly or any odd mistakes you see. Make sure to save!