[Radiance-general] Sunlight through glass

[Jack de Valpine]

Hi Kirk,

It is interesting to see some of these comments. I am not exactly clear 
on the problem that they are trying to solve though. But I think one 
thing to keep in mind is that a lot of people (architects, designers and 
the architectural rendering folks) have a lot of pre-conceived ideas 
about how light should behave and how a scene should appear. These 
preconceptions can lead to a lot of problems when it comes to evaluating 
or simulating physical performance.

-Jack

Kirk Thibault wrote:

> So I've been following this raging debate over at the Maxwell Render 
> forums regarding the physical accuracy of renderers and the specific 
> problem of visualizing the following scenario, to the best of my 
> understanding:
>
> Architectural rendering folks want a renderer that can accurately 
> depict sunlight, through glass into the interior of a space.  They 
> want this interior lighting to be visualizable from the exterior of 
> the space as if you were standing outside with your camera, looking 
> through the window, into the interior of the space.
>
> here are some quotes:
>
> 1.
> - - - - - - - 
> No one has presented a proper sollution to this problem. 
> I´m referring to rendering an interior space seen from an outside view 
> in sunlight, trough glass without cheating. 
>
> This is a milestome in 3d art!! 
> If the MR team feel confident to deliver this in due time ok!! 
>  - - - - - -
>
> 2.
>  --  - - - 
> I assume you mean it would be a milestone for Maxwell? Every other 
> renderer I've ever seen can handle this very easily.
>  - - - - - 
>
> 3.
>  - - - - -
> he key is that he said "without cheating". 
>
> No other renderers can do it in the physically correct way. They all 
> make it up.
>  - - - - -
> etc.
>
>
> Is this a difficult rendering scenario for RADIANCE or any other 
> renderer or are these people missing something?  There are some 
> seriously pissed off people in the Maxwell Render forums, especially a 
> lot of architect types who seem to think that the beta releases of M-R 
> should solve all of their problems. I was more curious about the 
> ability of Radiance to handle this type of scenario versus M-R which 
> claims to be a physically-based renderer.
>
> Thoughts?
>
> Let me also be very clear that, after reading the vituperous 
>
> kirk
> ------------------------------
>
> Kirk L. Thibault, Ph.D.
> kthibault at biomechanicsinc.com <mailto:kthibault at biomechanicsinc.com>
>
> p.  215.271.7720
> f.   215.271.7740
> c.  267.918.6908
>
> skype. kirkthibault
>
>
>
>
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-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction

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