6.2. Advanced Image-Based Lighting
The technique of image-based lighting can be used not only to illuminate synthetic objects with real-world light, but to place synthetic objects into a real-world scene. To do this realistically, the objects need to photometrically affect their environment; that is, they need to cast shadows and reflect indirect illumination onto their nearby surroundings. Without these effects, the synthetic object will most likely look "pasted in" to the scene rather than as if it had actually been there.
A limitation of the techniques presented so far is that they require that the series of digital images taken span the complete range of intensities in the scene. For most scenes, the range of shutter speeds available on a ...
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