[Radiance-general] Metal roofing

[Jack de Valpine]

Hi Rob,

One thing to try would be to use the corrug.cal which simulates 
corrugations. I know this is not exactly the same but it would give you 
the linear effect of such a roofing material. One could probably modify 
this with a step function to great a sharp cutoff versus what the smooth 
funtion in corrug.cal. Perhaps another option would be to engineer a 
simple repetitive cal with with perhaps three different value (color at 
top of metal rib, color at bottom and shadow). Yet another alternative 
could be to make an image map in Gimp (or photoshop) that can be tiled 
to create the effect you want.

-Jack

Fitzsimmons, Rob wrote:
> Can someone point me to a cal file, or a method to make a metal roof?
>
> Something with a profile like this ASCII art
>         __           __
> _______|  |_________|  |____   etc...
>
>
> Even a brightdata (without the ridge geometry) that would indicate the
> ridges.
> I thought there was one in the sample Radiance files (cabin, etc) but I
> can't find it.
>
> Thanks
>
> BTW - progress renders are here...
> http://www.rastermon.com/Remodel.htm
>
>
> Rob
> -----Original Message-----
> From: Fitzsimmons, Rob [mailto:rob.fitzsimmons at summit.fiserv.com] 
> Sent: Friday, May 26, 2006 11:24 AM
> To: 'Radiance-general at radiance-online.org'
> Subject: RE: RE: [Radiance-general] Art work surface
>
>
>  
> Here is version 1 of our remodel
>
> http://www.geocities.com/rastermon/Version1.html
> The designer is using Sketchup and I'm rendering with - of course -
> Radiance. Composite done in photosop.  Radiance view did not match pic, so I
> did a little skewing in PS.
>
> Thanks for all the input on art lighting - I'll post  pics as it comes
> along.
>
> Rob
> -----Original Message-----
> From: Lars Grobe
> To: Radiance general discussion
> Sent: 5/26/2006 2:05 AM
> Subject: Re: RE: [Radiance-general] Art work surface
>
> Hi Thomas!
>
>   
>> They were directed to north because they had to be huge and you had to 
>> avoid direct sunlight. Northern light also varies not much over the 
>> day.
>>     
>
> Ok... that is what I wanted to describe as continous ;-)))
>
>   
>> Only directional light would indeed be irritating but you need a 
>> certain directional component to render the shape.
>>     
>
> Well, if you have no clear window at all you also might get mad.
>
>   
>> No! Don't use that stuff! We had an exhibition pavillion in my 
>> university built with honeycomb insulation between two glass profiles. 
>> The profiles alone might have worked well but the building inspector 
>> insisted in an insulation of the wall. The honeycombs diffuse the 
>> light so much that there is hardly a directional component left. It 
>> looks odd and the sculptures and architectural modells are shaded 
>> poorly even if the interior is rather bright.
>>     
>
> That sounds interesting, as I actually do not have experienced such a room.
> Were the panels used on all sides or to one direction only? My idea was to
> have a big diffuse-translucent wall (only) to north. Also Ithink that for an
> exhibition pavillion, especially for architectural models, a diffuse
> environment is a terrific idea. All those I know use spots to take fotos of
> their models and to show them (of course with a diffuse environment around).
>
> But I really wonder on the impact of these panels on color, did you
> experience any noticable effect? It would also interesting to know what
> happens after some years, at least with those based on plastics (I would not
> worry about the glass-based products, but I am also not sure here).
> Christopher has done validation work on such panels, maybe he has more to
> say about it.
>
>
>   
>> Thomas
>>
>>
>>     
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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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