[Radiance-general] ambient light

[Fitzsimmons, Rob]

What is your light source? Even an ambient light has to begin somewhere. Maybe an overcast sky without a sun?  
Are you using rad with a rif file? If so, increase the quality...
Your -ad and -as settings are pretty small
QUALITY=h
DETAIL= h
VARIABILITY= m

Rob

-----Original Message-----
From: radiance-general-bounces at radiance-online.org on behalf of bei.xiao at gmail.com
Sent: Tue 11/25/2008 8:49 AM
To: Radiance-general at radiance-online.org
Subject: [Radiance-general] ambient light
 
Hello,

I am trying to render an image using only ambient light.  I noticed that the
reflected light appears to be non-uniform across the objects in the scene.
The scene is a open box with the open part facing the viewer and only
surfaces inside the box are lit (outside of the box is dark).  It appears
that the light has some directionality to it.  I'm guessing that there is a
setting value that I have not appropriately set or something.  I wondered if
anyone had an idea what might be problem. The rpict parameters are listed as
the following:

rpict -t 12 -vf view_files/rightview.vf -x 1600 -y 1600 -ps 3 -pt .08 -dp
512 -ar 48 -ms 0.71 -ds .2 -dj .5 -dt .1 -dc .5 -dr 1 -sj .7 -st .1 -ab 1
-aa .15 -ad 800 -as 128 -av 0.5 0.5 0.5 -lr 8 -lw .002 -dj 0.6 -dt 0.01 -dr
3 -ds 0.1 -sj 0.7 -st 0.15 -dc 0.5 -lr 1 -aw 0 -av 0.02317 0.02317 0.02317

Any ideas would be appreciated.

Thank you,

Bei

-- 


Bei Xiao
Room 330 C
3401 Walnut Street C Wing
Department of Neuroscience
University of Pennsylvania
Philadelphia, PA 19104, USA
Web: www.psych.upenn.edu/~beixiao
flickr:www.flickr.com/photos/slowtempo

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