Image Based Lighting
Once a subject is converted into a 3D model, then a new world opens up!
The model can be relit using lighting and subject from a 360 degree, high dynamic range (HDR) panoramic image.
The panoramic image now becomes the basis for lighting of the model.
This becomes a seamless integration of lighting and model.
More realistic than a conventional chroma key.
Here is a subtle example of how the lighting of the model changes as the background changes. Note that this is not a photograph, it is a 3D model!