[Radiance-general] Insane Daylight Factor Rendering

[Nick Doylend]

I think that was it, it must have been good coffee.  I found Rad was
setting an ambient value of 10.  I added -av 0.01 0.01 0.01 to the .rif
file's render option and got images that weren't so groovy looking but
did give a better indication of something like a reasonable daylight
factor. (http://ndoylend.fastmail.fm/temp/test02_c5.jpg)

This is with an indirect setting of 2.  I suppose I should reduce the
ambient value to zero and increase the indirect to get a more realistic
DF, but is it worth it (these are for visualisation only)?

Thanks for the suggestion,

Nick

-----Original Message----- 
From: radiance-general-bounces at radiance-online.org
[mailto:radiance-general-bounces at radiance-online.org] On Behalf Of
Thomas Bleicher 
Sent: 21 September 2008 09:22 
To: Radiance general discussion 
Subject: Re: [Radiance-general] Insane Daylight Factor Rendering


On 20 Sep 2008, at 22:58, Nick Doylend wrote:

> Can anyone shed some light (sorry) on this one?

Here's another one:

What's your -av  setting? You have  a very dark sky and a typical -av
value would increase your lighting levels quite significantly in this
situation. At the edges of the floors/ceilings this would be less
noticeable because there is some sky or ground glow in direct view. In
the centre of the planes the -av setting would brighten up the material
when the number of ambient bounces is exceeded.

It might just be an insane idea I head over my breakfast coffee.

Thomas



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