[Radiance-general]radiance daylight study

[steve michel]

Mark this almost solved..
Well I am using Sketchup export with SU2RAD. Initially, I was trying to view the sunpatchs on the far wall and floorplan with viewer's back to the window. When I rendered with the view towards the window opening (and gensky with +s sunny sky) I couldn't 'see' the sun patch. But when I checked with sketchup, I could see where a sunpatch should be, but it didn't appear in the render. To make sure ,I used sketchup shadow with time and location that shows a sunpatch clearly. Time is set 07:49am EST in sketchup; after export the generated sky file shows:

!gensky 10 31 +02:49 -a 45.52 -o 73.57 -m 75.0 +s -g 0.2 -t 1.7| xform -rz -0.0

obviously not what I wanted..So it renders correctlafter I manualy set the time to 07:49....could it be the exporter causing the 5hr difference???


----------------------------------------
> From: gward at lmi.net
> Subject: Re: [Radiance-general]radiance daylight study
> Date: Sat, 19 Jan 2008 07:48:49 -0800
> To: radiance-general at radiance-online.org
> 
> Hello Steve,
> 
> A few more details are needed to help with your problem, such as:
> 
> 1) The exact location of your building (longitude, latitude, time  
> zone, orientation)
> 
> 2) The time of day/year you are trying to recreate
> 
> 3) The options you are currently using for gensky, assuming that's  
> what you are using
> 
> -Greg
> 
>> From: steve michel 
>> Date: January 19, 2008 5:33:27 AM PST
>>
>> I want to validate a sunpatch study for an existing office space.  
>> But my renders don't show shadows correctly. I use Sketchup export  
>> with a rif file set to QUALITY=high and other settings set to  
>> MEDIUM to rapidly show direct sunlight on workplanes. The modeled  
>> space has the correct window openings and surface reflectances.  
>> Even when I adjust exposure interactively in X window, I don't see  
>> the correct sunpatch/shadows I expect for the location/time sky  
>> model (+i).
>>
>>
>>
>> my render settings are as follows:
>>
>> < Scene_1.oct
>> 	rvu -vu 0 0 1 -vf views/Scene_1.vf -ps 1 -pt .04 -dp 2048 -ar 105 - 
>> ms 0.24 -ds .1 -dj .65 -dt .05 -dc .75 -dr 3 -sj 1 -st .01 -ab 3 - 
>> aa .1 -ad 1536 -as 768 -av 8 8 8 -lr 12 -lw .0005 -R Scene_1.rif -o  
>> x11 -pe -4 Scene_1.oct>>
>>
>> Any help there would be appreciated\\\
>>
>>
>> regards
>> Steve
> 
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