There's very clear posterization in the yellow die and in the green die's highlights. That shouldn't be surprising -- high color depth images need more than 25

There's very clear posterization in the yellow die and in the green die's highlights. That shouldn't be surprising -- high color depth images need more than 256 colors to represent their image with fidelity. See more: http://en.wikipedia.org/wiki/Posterization http://en.wikipedia.org/wiki/Posterization