I believe this is due to the physical “walk-through” which can be repeated until the internal imagery begins to appear.
Many people find it easier to visualize an object or location in their home than anywhere else.
Guided imagery can be practiced in isolation, but it is frequently paired with physical relaxation techniques such as progressive muscle relaxation and massage.
When guided imagery is paired with physical relaxation techniques, the aim is to associate the sensations of relaxation with the peaceful visual image, so that future practice sessions involving imagery alone will quickly bring back to mind the physical sensations of relaxation.
Finally, guided imagery can work through the associative process described above, where scenes become a learned cue or trigger that helps recall memories and sensations resulting from past relaxation practice.
For example, the Tibetan Book of the Dead provides preparation and guidance for an ancient out-of-body method.
This technique was incorporated into lengthy religious ceremonies which were performed over a period of days.
Have fun with the techniques and enjoy the results.
One of the most important decisions you face in out-of-body exploration is the selection of the technique on which to focus.