[Radiance-general] soft shadow

[Giulio Antonutto]

Hi,
some quick suggestions:
 
try with -ds reduced to .1 or .05
and
with -dj increased to .6 or .8

these two options rule the light subdivision for large sources (-ds) and the
jittering (-dj).

You have also to oversample your image by a factor in order to obtain nice
and soft penumbra effect.  (rpict double or more + pfilt = final image )

There is a really good web page by Mark Stock, who explains some tricks
about penumbras:
http://mark.technolope.org/radmisc/aa0_ps1_test/final.html

I hope it helps,
giulio

-----Original Message-----
From: Bei Xiao [mailto:beixiao at mail.med.upenn.edu]
Sent: 10 June 2004 00:24
To: Radiance general discussion
Subject: [Radiance-general] soft shadow


Hi,
   I used 4 area light sources to render a scene which include one glossy
object.
But the shadows in the scene are very harsh. I turned off the ambient
light.
My major parameters for rad commend are:
ps 3 -pt .08 -dp 512 -ar 101 -ms 0.71 -ds .2 -dj .5 -dt .1 -dc .5 -dr 1
-sj .7 -st .1 -ab 2 -aa .2 -ad 400 -as 64 -av 0.5 0.5 0.5 -lr 6 -lw .002
-aw 0 -av 0 0 0
  Are there ways that I could have softer shadows?

Thanks a lot.

Bei


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