[Radiance-general] 5-phase method model reflectance

[Andrew McNeil]

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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