July 2015
Intermediate to advanced
586 pages
17h 21m
English
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292 III Lighting
cut out of the balcony and the roof above is now lit by bounce light. The slice
shapes were not altered in any way: opening the hole in the balcony only changed
the transparency of one of the slices, allowing light to propagate from the cell
beneath the balcony to the cell above.
5.10 Conclusion
We have presented a method for efficiently evaluating irradiance from a flat sur-
face using an image pyramid, and an efficient method for rebuilding the image
pyramid at runtime.
The biggest weakness of this approach is the requirement that the scene be
represented by a set of slices. If this requirement can’t be met, there will be light
leakage
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