When I was young, and even to do this day, I absolutely loved the miniscule pieces of artwork featured on the initial cardbacks of the Masters of the Universe figures. The illustrations of the characters looking somewhat different to their produced action figures used to fascinate me, even though they were no bigger than a postage stamp! As the line continued these illustrations would match the figures a great deal more in both design and pose. In this beautiful illustration of Skeletor we can see that he is posed a lot less like the figure, with details not found on the action figure produced.
(click on the image to see it at full-size)