It is usually used for movies. Distinctive appearance:
Slightly round corners, transparent.
As in real life, you only need one cover bitmap here, which is then inserted virtually into the case.
This case is usually available in only one standard color. Of course you can also assign your own color to the case.
See this object in action. As part of an advertisement, within a collection or as a single presentation.
Change the spine width to calculate the recommended pixel dimensions of the entire cover bitmap.
For your presentation, you can also just adjust the transparency and shine of a given case standard color.