I was recently asked to provide a realistic visualisation of Wickersley Catholic Church, a late 1960's structure which was due for redecoration.
 
The project called for realistic 'before' and 'after' 3D renderings of the primary structures of the building, using Brazil r/s to calculate radiosity solutions for accurately depicting the effect of transmitted and reflected light onto and from the various surfaces.

As can be clearly seen, the renderings show a surprising amount of difference, illustrating the accuracy of and commercial usefulness of radiosity for quick visualisations.  Imagine
Photo Matches

Original Photo Computer match with photo Computer image of paintjob
     
Original Photo Computer match with photo Computer image of paintjob
     
More Views
Photo Computer Image
   
Before After
 
360 Panorama (requires QuickTime 5 or higher)

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