So you want reflections, but under instead of on your object?
Mirrors – Shoot into or on mirrors is an amazing technique which not only gives reflection but adds more light to the scene.
Plexiglass – Being reflective yet it is not as strong a reflector as the silvering coat of a mirror. So while providing a great reflection, it will not add light to the scene as would a mirror.
Besides plexiglass comes in various colors. Take a minute to search the options manufacturers offer in plexiglass color.
Plexiglass can also add a density to shadow and reflection unlike other translucent materials. It is one of the most versatile materials I know of within the uses of photography.
Glass – A great reflector as the mirror and not as direct in adding light to the scene as plexiglass, glass itself in a great surface for reflections. One drawback to using glass is that it is fragile. That is only a drawback if you intend that your pane of glass remain intact throughout your photo shoot. Some photographers will use reflections in broken glass which brings up a whole new realm of ideas.
Water – Perhaps one of the most powerful, difficult and predictable substances on the earth, is also one of the cheapest and most accessible substances to capture reflections.
Considering the weather and time of year when planning a photo session is a good idea, even if only to verify that your annual day of rain is not schedule in the same day.
Possibilities are only as limited as my imagination! I love the study of light! Have fun as you learn and grow!
A parting thought: “We only have this moment once to enjoy, so I choose to enjoy it with this foundation; faith, on which to build the structure of physics as I soar into the realm of freedom, liberty and true creativity!”