Die cutting of the cover image or inserts is probably the most common technique employed to create gimmick covers. It's probably also in most cases the cheapest.

There are thousands of die cut covers. Here are a few of the more popular and best known releases.

Here is a comparison between a genuine official copy of Aerosmith Pump made by Universal and a Russian counterfeit copy. In the picture, the real one is on the left and the fake is on the right.

This fake Led Zeppelin 40th Anniversary appears to be made in China. You would find it hard to pick a sealed copy of this as being anything other than than the real deal.

Inside it is also remarkably similar but has some significant, obvious differences in packaging including: (a) the CD comes in a flimsy loose fitting bag (b) Physical Graffiti has no cut out windows and (c) III (3) has no turning wheel.

The CDs also have the tell tale extra ring in the middle but this is much better disguised than usual.

Unusually for fakes these have the catalogue number and an IFPI code (CC 303) on the silver side of the disc.