We present an interactive relighting technique where different areas of the image can be illuminated with combinations of dfferent lighting directions. The approach is to first capture a 4D reflectance field using a light stage, then interpolate user-specied light constraints using radial basis functions, and finally render the calculated illumination result in real-time using the GPU.
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![](https://i.ytimg.com/vi/Yy2shsPhUIU/mqdefault.jpg)