Here is a step that may take a while to get right because when you draw zombie eyes, they need to be very expressive. All that is on a zombie's dead mind is brains. So, having said that let's get started with the eyes. Sketch out the shapes of the eyes, but we will pay more attention to the left eye since it's the one that is going to be completely drawn in. Once the eye shapes are drawn, sketch in the bony brows that are in an angry expressive pose. Next, sketch in some crinkles, wrinkles, or creases to add definition and a bit of shading under the left brow bone. Draw in the shape for the nasal cavity, then sketch in some detailing marks on the face.