[Radiance-general] RE : Light Shelf Reflections

[Shamim Javed]

Andy,

How could you tell by just looking at the numbers that my ceiling surface
normal was facing up?

I am trying to import the results of the radiance simulation (with bands of
light hitting the floor) on to an analysis grid to finally generate an
illumination graph that would have progressive 'bumps' reflecting these
light bands.  https://www.dropbox.com/s/owvm7gqtamicdou/analysis%20grid.pdf
Any suggestions on an effective way of doing this would be much appreciated.

My radiance image has a distinct raddish tint unlike yours which came out
with much more natural colors.  Any thoughts how I may improve this?

Shamim.


On Fri, Mar 15, 2013 at 7:18 PM, Andrew McNeil <amcneil at lbl.gov> wrote:

> one more thing  - can you double check that the ceiling surface normal is
> still facing downward (and that you didn't re-export geometry from
> ecotect).  It seems odd that there is one reflection of the the floor but
> none off the ceiling (the light that gets to the floor comes straight
> through the window and misses the light shelf).  There should be the same
> number of reflections from both.
>
> Andy
>
>
>
> On Fri, Mar 15, 2013 at 4:00 PM, Andrew McNeil <amcneil at lbl.gov> wrote:
>
>> Shaim,
>> Can you try typing the commands I sent directly at the dos prompt?
>> That would tell us if it is a problem with the outdated version of
>> Radiance you are using or if it is a problem with the Ecotect Radiance
>> Control Panel.  I still think it is a problem with the latter as the
>> commands settings didn't get into the header created by Radiance.
>>
>> I'd rather determine if Ecotect related software is the cause now, rather
>> than going further assuming that it is Radiance (which I doubt, but I am
>> biased).
>>
>> Andy
>>
>>
>> On Fri, Mar 15, 2013 at 3:45 PM, Randolph M. Fritz (i) <
>> randolph+LD at panix.com> wrote:
>>
>>> 1998 is pretty old--it's possible we're giving you advice for newer
>>> versions.
>>>
>>> NREL has a newer release of Radiance for Windows. I'm pretty sure you
>>> can hook it up with Ecotect, but I'm not sure exactly how.  Anyone done
>>> this?
>>>
>>> Randolph
>>>
>>>
>>>
>>> On 2013-03-15 20:19:41 +0000, Shamim Javed said:
>>>
>>>  I looked at the files generated by Radiance via Ecotect and it looks
>>>> like the version of Radiance it is using is 3.1.8.  Here is a copy of one
>>>> of the files generated:
>>>>
>>>> "#?RADIANCE
>>>> oconv mirror_scorrected_sky.rad mirror_scorrected.rad
>>>> rpict -t 120 -vth -vp 9.628 4.564 6.510 -vd -1.701 0.360 -0.007 -vu 0 0
>>>> 1 -vh 180 -vv 180 -vs 0 -vl 0 -dp 1024 -ar 45 -ms 0.17 -ds .3 -dt .1 -dc .5
>>>> -dr 1 -sj .7 -st .1 -ab 4 -af RCP.amb -aa .2 -ad 400 -as 64 -av 0.01 0.01
>>>> 0.01 -lr 6 -lw .002 -i -x 64 -y 64 -ps 1
>>>> SOFTWARE= RADIANCE 3.1.8 lastmod Thu Sep 17 20:49:56 PDT 1998 by
>>>> droberts on escher"
>>>>
>>>> On Fri, Mar 15, 2013 at 2:22 PM, Randolph M. Fritz (i) <
>>>> randolph+LD at panix.com> wrote:
>>>> On 2013-03-15 15:17:59 +0000, Shamim Javed said:
>>>>
>>>> I tried to replicate your simulation image (using Radiance via Ecotect)
>>>> but without success so far.
>>>>
>>>> Where did you get your copy of Radiance? Do you know what version it is?
>>>>
>>>> If not, "getinfo foo.hdr" will identify the version of Radiance that
>>>> generated foo.hdr.
>>>>
>>>> Randolph
>>>>
>>>>
>>>>
>>>>
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>>>
>>>
>>> --
>>> Randolph M. Fritz
>>>
>>>
>>>
>>>
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>>
>>
>
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