
90 3. Supporting Shadows for Other Geometry Types
Fi gure 3.9. Voxels as indicated by the boxes within a voxel set (grid). Image courtesy of Arjan
Westerdiep.
mathematics, weather, etc. Voxels have also been used more and more in lm
special eects for clouds, smoke, re, etc., with soware from JIG, Hypervoxels,
etc. Note that voxels are typically semitransparent (as encoded in the A of the
voxel’s RGBA). is is another potential dierence with most point-cloud data,
wherepointcloudsareusuallyassumedtobeopaque.
In this section, the coverage on shadows from voxels will include several classes
of algorithms, with all of the research papers focusing