Using the facial guidelines you made in step one, start sketching out the shapes of the eyes first, and then color them in hollow. Next, sketch in the crease between the eyes on the forehead like so for added definition and detail, and then draw the bony detailing along the muzzle of the deer skull. In the center of the snout add another crease line for added definition. You will then end this step by drawing the oblong shaped nostril holes like so, and color them in as well.