Step 6: Draw the middle part of Master Chief's helmet using the construction lines and the right side of the original circle as a guide. First create the outer shape by giving it more angles. Then draw the small horizontal lines within the shape for detail. Draw a small rectangle at the bottom.
Step 7: Finish the top part of Master Chief's helmet by drawing the right section. Use the upper right side of the original circle as a guide when you darken the shape. Notice that the lower portion sticks out a bit to form the visor on the helmet.
Step 8: Draw Master Chief's face shield sitting right below the shapes you just created. The bottom part of the shield has a few angles and corners. Use the middle segment created by the construction lines as a guide when drawing the shield.
Step 9: Draw the line that goes across Master Chief's face shield. It's kind of a U-shaped arc that has a few angles and corners.
Step 10: Now draw the left side of Master Chief's helmet using the original circle and construction lines as guides. Draw these shapes using straight lines to give the helmet a sturdy feel. Use the image above for further reference.