[Radiance-general] 5-phase method model reflectance

[G]

ok, if you all insist I will not quit :-)
but beware, I may ask the odd thing here and there…
thanks
G

On 18 Jun 2015, at 02:14, Andrew McNeil <amcneil at lbl.gov> wrote:

> Noooooooooo! 
> Don't quit.
> 
> On Wed, Jun 17, 2015 at 5:29 PM, Greg Ward <gregoryjward at gmail.com> wrote:
> Don't say that, Giulio -- I would have to quit, too!  I was also puzzled by the -st 1 setting....  (I still need to learn Andy's 5-phase method.)
> 
> -Greg
> 
>> From: G <antonutto at yahoo.it>
>> Subject: Re: [Radiance-general] 5-phase method model reflectance
>> Date: June 17, 2015 5:15:56 PM PDT
>> 
>> Thanks Andy! 
>> There is a time to quit boxing…
>> Maybe it is my time today…
>> :-)
>> G
>> 
>> On 17 Jun 2015, at 22:25, Andrew McNeil <amcneil at lbl.gov> wrote:
>> 
>>> Hi Giulio,
>>> 
>>> A jitter of 100% will lead to aiming failure? 
>>> Greg (and David G-M) changed the way direct jittering works for round sources so that there are no longer aiming failures (http://www.radiance-online.org/community/workshops/2009-boston-ma/Presentations/GW_RadianceImprovements.pdf).
>>> 
>>> and also setting a specular threshold to 100% will mean no specular sampling?
>>> You want to turn specular sampling off for the direct sun coefficient matrix to avoid double counting in the 5-phase method.
>>> 
>>> Best,
>>> Andy
>>> 
>>> 
>>> 
>>> On Wed, Jun 17, 2015 at 1:53 PM, giulioandrea antonutto foi <geotrupes at me.com> wrote:
>>> Off topic completely… 
>>> your setting for dj and st are a bit odd. maybe interesting to know if there is a reason.
>>> A jitter of 100% will lead to aiming failure? 
>>> and also setting a specular threshold to 100% will mean no specular sampling?
>>> unless there is a reason? new radiance settings meaning different things?
>>> just a curiosity.
>>> G.
>>> 
>>> 
>>> 
>>> On 17 Jun 2015, at 17:56, Eleonora Brembilla <E.Brembilla at lboro.ac.uk> wrote:
>>> 
>>>> At first I thought the reflectances assigned to the model would not matter for the part that is specific to the 5-phase, as the model is assigned a black material, but comparing the resulting matrices it looks like the Sun Coefficient Matrix (.dsc) changes with the original materials’ reflectances (and it’s the only matrix that change). And that is exactly the matrix that is taking most of the computational effort (about 4 hours I think - the same model with the 2-phase method takes 5 minutes, glazing is all simple clear glass).
>>>> 
>> 
> 
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