 
 
the dispenser: squashed
Use these 
    versions to create the illusion of an interface with buttons which change 
    shape when touched or grow dark when unavailable. Select a button area and 
    copy it as a separate image; swap that image for the basic image on mouseOver 
    or other changed state.
    I've rendered the full image for the different states rather than just the 
    button areas in order that all the 3D depth and reflections will be present 
    and correct for each altered state. 
the dispenser dark