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Comparing ray/doc/man/man1/rtrace.1 (file contents):
Revision 1.13 by greg, Tue Jun 14 03:34:14 2005 UTC vs.
Revision 1.18 by greg, Sat Dec 12 19:00:59 2009 UTC

# Line 87 | Line 87 | d      direction (normalized)
87   .IP
88   v       value (radiance)
89   .IP
90 + V       contribution (radiance)
91 + .IP
92   w       weight
93   .IP
94   W       color coefficient
# Line 228 | Line 230 | format.
230   .I \-f
231   option, above.)
232   .TP
233 + .BI -n \ nproc
234 + Execute in parallel on
235 + .I nproc
236 + local processes.
237 + This option is incompatible with
238 + .I \-P
239 + and
240 + .I \-PP,
241 + and is not currently supported with the
242 + .I \-I
243 + option.
244 + Multiple processes also do not work properly with ray tree output
245 + using any of the
246 + .I \-o*t*
247 + options.
248 + There is no benefit from specifying more processes than there are
249 + cores available on the system or the
250 + .I \-x
251 + setting, which forces a wait at each flush.
252 + .TP
253   .BI -dj \ frac
254   Set the direct jittering to
255   .I frac.
# Line 610 | Line 632 | system call will share memory on a copy-on-write basis
632   .SH EXAMPLES
633   To compute radiance values for the rays listed in samples.inp:
634   .IP "" .2i
635 < rtrace -ov scene.oct < samples.inp > radiance.out
635 > rtrace \-ov scene.oct < samples.inp > radiance.out
636   .PP
637   To compute illuminance values at locations selected with the 't'
638   command of
639   .I ximage(1):
640   .IP "" .2i
641 < ximage scene.pic | rtrace -h -x 1 -i scene.oct | rcalc -e '$1=47.4*$1+120*$2+11.6*$3'
641 > ximage scene.hdr | rtrace \-h \-x 1 \-i scene.oct | rcalc \-e '$1=47.4*$1+120*$2+11.6*$3'
642   .PP
643   To record the object identifier corresponding to each pixel in an image:
644   .IP "" .2i
645 < vwrays -fd scene.pic | rtrace -fda `vwrays -d scene.pic` -os scene.oct
645 > vwrays \-fd scene.hdr | rtrace \-fda `vwrays \-d scene.hdr` \-os scene.oct
646   .PP
647   To compute an image with an unusual view mapping:
648   .IP "" .2i
649 < cnt 640 480 | rcalc -e 'xr:640;yr:480' -f unusual_view.cal | rtrace
650 < -x 640 -y 480 -fac scene.oct > unusual.pic
649 > cnt 480 640 | rcalc \-e 'xr:640;yr:480' \-f unusual_view.cal | rtrace
650 > \-x 640 \-y 480 \-fac scene.oct > unusual.hdr
651   .SH ENVIRONMENT
652   RAYPATH         the directories to check for auxiliary files.
653   .SH FILES

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