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Comparing ray/doc/notes/ReleaseNotes (file contents):
Revision 1.24 by greg, Sun Dec 14 16:33:37 2003 UTC vs.
Revision 1.25 by greg, Wed Dec 31 01:50:02 2003 UTC

# Line 1222 | Line 1222 | Replaced all calls to vfork() with regular fork() call
1222   Fixed bug in glarendx for dgr calculation with sources behind view.
1223  
1224   Added -p option to histo to print percentages/percentiles r.t. counts.
1225 +
1226 + Added a source occluder cache to accelerate shadow testing.  This
1227 + can save up to 50% of the calculation time in scenes with many
1228 + light sources, especially ones containing large occluders.  This
1229 + optimization may be tuned or switched off with the -DSHADCACHE=N
1230 + compile switch, where N is the resolution of the shadow cache, or
1231 + 0 to disable it.  Since this is purely a time vs. memory trade-off,
1232 + I decided not to make it a new command-line option.  (We already
1233 + have plenty.)

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