[Radiance-general] Shadow above highlight?

[Zack Rogers]

Hi John,

Even without this funny sampling behavior I think there could be a slightly darker patch on the ceiling due to the 1/3 x 1/3 square on the adjacent wall that has a 0% reflectance.  That dark portion of the ceiling could just have a stronger coupling to the 0% reflectance surface than the other surfaces around.  Do your radiosity renderings show any darker spots on the ceiling?

Cheers,
Zack


________________________________

  ZACK ROGERS, P.E., LEED AP, IESNA 
 
INTEGRATED DESIGN ASSOCIATES, INC
437 Main Street
Longmont, CO 80501
tel: 303.848.8299, fax: 303.848.8290 
www.ideasi.com 

-----Original Message-----
From: radiance-general-bounces at radiance-online.org [mailto:radiance-general-bounces at radiance-online.org] On Behalf Of Thomas Bleicher
Sent: Friday, August 14, 2009 2:58 AM
To: Radiance general discussion
Subject: Re: [Radiance-general] Shadow above highlight?

On Fri, Aug 14, 2009 at 12:44 AM, Greg Ward <gregoryjward at gmail.com> wrote:
>
> Hi John,
>
> I spent a little time looking at your model, and there are some irregularities that I'm not sure are intentional.  Specifically, I rendered a view from the darker region of the ceiling looking down like so:

[...]

> The light patch is the one seen at the bottom of your original view, but the dark patch below it (actually towards the camera in your first view) is peculiar.  It appears to be an opening, where light goes but does not return.  Was this what you meant to do?  Are you radiosity calculations OK with this?  Infinite rays may cause some oddities in the interpolation, which I think is at least part of what we are seeing in the 10-20% level drop in the dark patch on the ceiling.


The dark patch should be the window opening. The ground glow has been removed from the sky description so you look into the ...

... cold dark void. [cue flash and rolling thunder]

Thomas ;)

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