- 3 dimensions
- Pictures are by nature 2 dimensional, trying to capture a 3 dimensional world. Thinking in foreground, midground and background (or distance) when you compose your image, can help bring the illusion to life that the image has a third dimension. So putting something in the foreground to give a bit of edge or contrast relative to the subject (typically found in the midground) can help make your image appear more 3D like.
Another role of the foreground can be to help bring the viewer closer to the scene.If you shoot a portrait of a person and the edge of the picture depicts a door, or if you shoot your subject through some vegetation, where the viewer almost feels like they are hiding somewhere and studying the subject.
The point is not to put something in the foreground each and every time. When shooting silhouette photography for example, the whole point is to play with the picture being 2-dimensional! But you can use it as one of many tools in your toolbox, exactly when you see the need to make your D2 images appear more 3D-ish!
Related reading
What is balance in photography?
Triangles as a way of composing and creating interest
