Virtual reality has become a common term,
with computer generated images appearing
in all forms of electronic visual media.

Ray-trace rendering,  a computer-based process
by which photorealistic images can be created
of objects and scenes that do not necessarily exist
in the real world,  is a tool used to produce
much of this form of art.

Here

are a few images of objects that could exist in the real world.

Then... there are objects that do not exist in the real world and never will.

Follow this link

to view examples of ray-traced images that are to virtual reality
what virtual reality is to the real world - literally,  metareality.