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Comparing ray/doc/man/man1/vwrays.1 (file contents):
Revision 1.10 by greg, Thu Jun 14 22:42:21 2012 UTC vs.
Revision 1.12 by greg, Sat Dec 4 16:29:29 2021 UTC

#	Line 47 | Line 47 | with the same
47		setting, providing a much faster way to average pixels over image sets.
48		The
49		.I \-pj
50	<	option should be used to jitter sample postions in most cases.
50	>	and/or
51	>	.I \-pd
52	>	options should be used to jitter sample postions in most cases.
53		.PP
54		View options may be any combination of standard view parameters described
55		in the
#	Line 70 | Line 72 | aspect ratio, unless this ratio is set to zero.
72		The
73		.I \-pj
74		option may be used to jitter samples.
75	<	The default value of 0 turns off ray jittering.
75	>	The
76	>	.I \-pd
77	>	option specifies a world-diameter aperture for depth-of-field jittering.
78	>	The default value of 0 for both options turns off all ray jittering.
79		.PP
80		If the
81		.I \-d
#	Line 144 | Line 149 | can reproduce any pixel ordering (i.e., any image orie
149		a rendered picture, it will only produce standard scanline-ordered rays when
150		given a set of view parameters.
151		.SH "SEE ALSO"
152	<	rcalc(1), rpict(1), rcontrib(1), rtrace(1)
152	>	rcalc(1), rcode_depth(1), rcontrib(1), rpict(1), rtpict(1), rtrace(1)

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