Hi All,
I’m going through the “Understanding rtcontrib” tutorial and got stuck when trying to get the Tregenza sky patches to work (page 16). I can’t figure out how to use the tregenza function and the binning with rcontrib:
DIMS=600
vw="-x $DIMS -y $DIMS -vf views/sky.vf"
oconv materials/testroom.mat objects/testroom.rad skies/sky_white.rad > testroom_whitesky.oct
vwrays -ff $vw |rcontrib @rtc.opt -ffc $(vwrays -d $vw) –V+ -f tregenza.cal -b tbin -o images/patches/p%03d.hdr -m sky_glow testroom_whitesky.oct
Which returns:
rcontrib: fatal - unspecified or illegal bin count for modifier ‘sky_glow’
My setup:
Windows 7
Cygwin
NREL’s latest Radiance version
What I tried so far:
-
Googling the error took me to the rcontrib.c source code… interesting but not immediately helpful
-
Changing when –f … –b … is specified which didn’t change the output (which is also stated in rtcontrib man page as I found out later)
-
I checked sky_white.rad and compared it with what is shown in the tutorial. Tick.
-
I checked my spelling multiple times… (hopefully) Tick
-
Replacing “-b tbin” with “-bn 146”, accidently with the view file back.vf, which resulted in a single, fairly dark picture. When repeating the command to look at the sky hemisphere, I get a uniform sky at around 178 cd/m²
Could anybody point me to my mistake?
Many Thanks in advance,
HM
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