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Capturing light via panorama. |
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Overview In this simple example, we show how it is possible to render synthetic 3D models using real-world lighting. The technique we use was developed by Dr. Paul Debevec of the Institute for Creative Technologies at USC. For this example we will use a series photographs taken by Dr. Debevec (right) during our 1999 expedition to Egypt. Working with Fathy Ahmed, Architect in the Engineering Center for Archaeology and the Environment at Cairo University, we provided this visual reference data for his current work at the Qani-bay mosque-madrasa. The madrasa, near Al-Hasan mosque and Muhammed Ali's Citadel, has one of the more attractive facades in Cairo. Amr Qani-bay al-Sayfi was a mamluke of the Sultan Qayt-bay; the structure is of a late Mamluke style, built in 1503 and has a three-tiered minaret, typical to the era. |
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An
Interior Panorama at
Qani-bay The movie at left was then built from the panoramic image shown below. |
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Lighting Digital Models with Real Light After creating the above panorama, it was then possible for us to map this panoramic image onto the inside of a environment sphere within synthetic 3D modeling software. Below at left is a detail
from the original panorama; at right is a composite image with new elements
(a sphere adn a chair) inserted into the shot with lighting culled from the background image.
For further details on this methodology, please see Dr. Debevec's discussion
of rendering with natural light. |
 A 3D rendering using the room's lighting. |
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