11-01-2009, 01:56 PM
The one on the left is pillowshading, where you simply keep outlining layers. It turns out really bad.
The one on the right is shading with anti-aliasing, as well as normal shading. Anti-aliasing is adding shades to the corners to make to colors blend nicer. the gray around ML3 sprites are examples of anti-aliasing with the background.
Sorry, I'm not to good at explaining things... :{