Load an image file into the Environment and the image will reflect on any reflective materials in your scene.
Open Display Options palette.
Select Environment option.
Click on Options button and load any image file(s).
Render your scene and observe the image reflects on reflective materials.
Note, load one image in the Spherical type or load six images for the Cubic type, then control how the image(s) are wrapped around your scene using the Center and Size button.
