ambient light only
diffuse light only -- now we can see the 3D shape of the sphere (the portion of the sphere away from the light is completely dark since it receives no light)
ambient and diffuse -- the image above looks more like natural lighting
specular -- the highlight on the sphere in the above image results from the specular component
color image with shadows
light attenuation makes the intensity of the light decrease with distance
antialiasing eliminates the jaggies
multiple point light sources
reflective objects
red/blue stereo image (you'll need special glasses to get the full 3D effect)