None of these are blocks, you can walk through them all. The display has been set to show (left to right): item frame, glass, grass
Hawker harrier jet with nose cone, landing gear, and other details made using item displays. (Made by mstrminecraft09)
Old school TV made using multiple item displays, as well as a drink of milk!
A demonstration of custom model data items, displayed at various scales. (small players not included) (Models by mstrminecraft09)
Item displays using this datapack where used to make the diagonal bonnet and other fine details (Unimog made by mstrminecraft09)
You can interact by clicking with the chat message to set the rotation of the nearest item display!

A datapack for simplifying using item displays for lots of extra details on your builds!