Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
made caching code slightly more efficient
added duplicate ray checking option (-u)
change clumpbeams() callback function to take clump's queue
moved routines to clumpbeams.c and made rhcopy clump beams
added check to see if single argument is writeable fixed bug in copysect() due to a wrong index added automatic temporary file removal on interrupt or error
build queue then read bug fixes in neighbor algorithm
Initial revision
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