I learned a new word today: Skeuomorph. As in, "the iPad DJ app is a perfect example of skeuomorphic
is a derivative object which retains ornamental design cues to a structure that was necessary in the original (thanks wikipedia).
Some examples, also from wikipedia:
Various spoke patterns in automobile hubcaps and wheels leftover from carriage wheel construction,
Fake woodgrain printing on thousands of modern items of plastic, Formica, or pressboard furniture,
Fake stitching in plastic items that used to be made of leather or vinyl and actually stitched together.
A Ducati Monster gas cap has five bolts, but only three of them are of any use, similar to an Audi TT gas cap I believe:
So maybe the gas cap isn't a good example.
Has anyone designed a skeuomorph product or parts? Did you have to take a shower afterwards, or were you OK with it? A plastics engineer here once tried to talk me into "molding in the hex bolt heads" ... but only once.