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<TITLE>RE: [Radiance-general] ambient light</TITLE>
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<P><FONT SIZE=2>What is your light source? Even an ambient light has to begin somewhere. Maybe an overcast sky without a sun? <BR>
Are you using rad with a rif file? If so, increase the quality...<BR>
Your -ad and -as settings are pretty small<BR>
QUALITY=h<BR>
DETAIL= h<BR>
VARIABILITY= m<BR>
<BR>
Rob<BR>
<BR>
-----Original Message-----<BR>
From: radiance-general-bounces@radiance-online.org on behalf of bei.xiao@gmail.com<BR>
Sent: Tue 11/25/2008 8:49 AM<BR>
To: Radiance-general@radiance-online.org<BR>
Subject: [Radiance-general] ambient light<BR>
<BR>
Hello,<BR>
<BR>
I am trying to render an image using only ambient light. I noticed that the<BR>
reflected light appears to be non-uniform across the objects in the scene.<BR>
The scene is a open box with the open part facing the viewer and only<BR>
surfaces inside the box are lit (outside of the box is dark). It appears<BR>
that the light has some directionality to it. I'm guessing that there is a<BR>
setting value that I have not appropriately set or something. I wondered if<BR>
anyone had an idea what might be problem. The rpict parameters are listed as<BR>
the following:<BR>
<BR>
rpict -t 12 -vf view_files/rightview.vf -x 1600 -y 1600 -ps 3 -pt .08 -dp<BR>
512 -ar 48 -ms 0.71 -ds .2 -dj .5 -dt .1 -dc .5 -dr 1 -sj .7 -st .1 -ab 1<BR>
-aa .15 -ad 800 -as 128 -av 0.5 0.5 0.5 -lr 8 -lw .002 -dj 0.6 -dt 0.01 -dr<BR>
3 -ds 0.1 -sj 0.7 -st 0.15 -dc 0.5 -lr 1 -aw 0 -av 0.02317 0.02317 0.02317<BR>
<BR>
Any ideas would be appreciated.<BR>
<BR>
Thank you,<BR>
<BR>
Bei<BR>
<BR>
--<BR>
<BR>
<BR>
Bei Xiao<BR>
Room 330 C<BR>
3401 Walnut Street C Wing<BR>
Department of Neuroscience<BR>
University of Pennsylvania<BR>
Philadelphia, PA 19104, USA<BR>
Web: www.psych.upenn.edu/~beixiao<BR>
flickr:www.flickr.com/photos/slowtempo<BR>
<BR>
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