--- ray/doc/man/man1/rpict.1	2016/05/18 12:45:55	1.21
+++ ray/doc/man/man1/rpict.1	2019/01/11 21:12:24	1.24
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: rpict.1,v 1.21 2016/05/18 12:45:55 rschregle Exp $"
+.\" RCSid "$Id: rpict.1,v 1.24 2019/01/11 21:12:24 greg Exp $"
 .TH RPICT 1 2/26/99 RADIANCE
 .SH NAME
 rpict - generate a RADIANCE picture
@@ -540,7 +540,9 @@ Global photon irradiance is evaluated as part of the a
 above), caustic photon irradiance is evaluated at primary rays, and 
 indirect inscattering in 
 .I mist
-is accounted for by volume photons.
+is accounted for by volume photons. Contribution photons are treated as
+global photons by
+.I rpict.
 .IP
 Additionally specifying 
 .I bwidth2
@@ -557,7 +559,7 @@ in which case the bandwidth, if specified, is ignored,
 is invariably looked up.
 .IP
 Using direct photons replaces the direct calculation with density estimates
-for debugging and validation of photon emission.       
+for debugging and validation of photon emission.
 .TP
 .BI -am " frac"
 Maximum search radius for photon map lookups.  Without this option, an
@@ -664,8 +666,8 @@ is zero, then Russian roulette is used for ray
 termination, and the
 .I -lw
 setting (below) must be positive.
-If N is a negative integer, then this sets the upper limit
-of reflections past which Russian roulette will be used.
+If N is a negative integer, then this limits the maximum
+number of reflections even with Russian roulette.
 In scenes with dielectrics and total internal reflection,
 a setting of 0 (no limit) may cause a stack overflow.
 .TP
@@ -912,4 +914,4 @@ option.
 Greg Ward
 .SH "SEE ALSO"
 getinfo(1), lookamb(1), mkpmap(1), oconv(1), pdfblur(1), pfilt(1), 
-pinterp(1), pmblur(1), printf(3), ra_rgbe(1), rad(1), rtrace(1), rvu(1)
+pinterp(1), pmblur(1), printf(3), ra_rgbe(1), rad(1), rpiece(1), rtpict(1), rtrace(1), rvu(1)