What you see in a lucid dream, such as the setting and what's in your field of vision.
Are they based on your own experiences (what you have seen before)?
So, let's say...would I be able to place the Eiffel tower in my dream to every precise detail, but I have never seen the tower before in my life.

Are they based on your imaginations?
If I cannot imagine something to the exact details, but I do know the basic form of it, the thing will come out in the basic forms

Or real life?
Everything that's on Earth now is where they are in the dream

Thankyous for considering the question =]