The above photo shows the four raw images that are used to make the final image on the right. By combining these images with certain software that has the capabilities for producing these HDRI photos, the final image can be adjusted to produce the exact image desired. Sometimes more shadow and less highlights or vice versa.
The above image after retouching and adjusting with the editing software needed for HDRI photography. A knowledge of how to register and align each raw image as well as choosing the right combination of the raw images will produce an image that is true to the eye. Notice the detail in the lamps, shadows and highlights.