[Radiance-general] Re: Vwrays-Rtcontrib generated image agreement with Rpict image

[Chris Humann]

Hi all,

I've been using rtcontrib to look at different window contributions in  
a space under an overcast sky.  When I 'pcomb' the resultant images  
and compare the illuminance values to an image generated with 'rad' I  
get light levels 1/3 of what I'm getting in the rad generated image.

For the rtcontrib routine I used:
oconv mat.rad d_cie.rad d_c1.rad d_c2.rad d_c3.rad d_c5.rad d_c6.rad  
d_c7.rad d_c9.rad d_c130.rad d_c131.rad d_c132.rad d_c133.rad  
d_c134.rad d_c255.rad > punch_40.oct

vwrays -ff -x 1024 -y 1024 -vf plan_1.vf | rtcontrib -ffc -I+ -V+  
`vwrays -d -x 1024 -y 1024 -vf plan_1.vf` @options.opt -o images/plan1_ 
%s.pic -M glass.txt punch_40.oct

The parameters set in the 'options.opt' file are:
-n 2
-ab 5
-ad 8000
-as 2000
-ar 800
-dt 0
-dc 1
-ds .2
-lw .000001

the "glass.txt' file contains the different glass geometries:
d_c130
d_c131
d_c132
d_c133

For the 'pcomb' routine:
pcomb -o plan_1_d_c130.hdr  -o plan_1_d_c131.hdr -o plan_1_d_c132.hdr - 
o plan_1_d_c133.hdr > plan_1_all_glass.hdr

For the 'rad' routine:
rpict -t 60 -vu 0 0 1 -vf plan_1.vf -x 2700 -y 2700 -dp 4096 -ar 323 - 
ms 0.31 -ds .2 -dt .05 -dc .75 -dr 3 -sj 1 -st .01  -aa .1 -ad 1536 - 
as 768 -av 0 0 0 -lr 12 -lw .0005 -ab 3 -i -ps 3 -pt .04 -o plan_1.unf  
d.oct

I'm sure I'm missing somethng, but am just not sure what.


Thanks!

Chris


Christian Humann ~ Associate
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