A modified Warp's radiosity file. I cut a high channel into the ceiling,
directly above the vase. The area light starts high (y*15) and drops to y*9.

The shadow has a wierd glitch under the table. At one point the edge
suddenly becomes solid.

Next I'm going to cut various shapes out of the ceiling, and have another
space above, with the light moving around inside.

Andy Cocker

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Attachments:
Download 'RadAnim.mpg' (333 KB)

Interesting. I'm looking forward to your findings...

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> The shadow has a wierd glitch under the table. At one point the edge
> suddenly becomes solid.

first think i noticed actually. think i will have to try something like this
myself and see what happens


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"Andy Cocker" <big### [at] mariner9fsnetcouk> wrote in message
news:3a1fb503@news.povray.org...
> The area light starts high (y*15) and drops to y*9.
>
> The shadow has a wierd glitch under the table. At one point the edge
> suddenly becomes solid.

Well, not solid actually.  More like scrambled.  Freeze frame it at the problem point
and it shows.
What were the settings for the area light?  jitter used? adaptive?  I was surprised it
didn't look as though
the usual flying pixel effect from jitter was obvious, so I figured maybe it had a
large number of light
sources instead.

Bob

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"Bob H."
<per### [at] aolcom?subject=PoV-News:%20&body=Relating%20to%20POV-Ray:>
wrote in > >Well, not solid actually.  More like scrambled.  Freeze frame it
at the problem point and it shows.
> What were the settings for the area light?  jitter used? adaptive?  I was
surprised it didn't look as though
> the usual flying pixel effect from jitter was obvious, so I figured maybe
it had a large number of light
> sources instead.

Barely altered code from Warp's original file:

#declare Light=
  union
  { box { <-1,-.2,-1><1,.2,1> no_shadow pigment { rgb 1 } finish { ambient
.25*4*1000 } }
    light_source
    { 0, 1 area_light x*1,z*1,10,10 adaptive 0 jitter  media_interaction on
media_attenuation on
    }
  }

Didn't use ORIENT.. maybe that would have avoided the prob.

Andy Cocker
---------------------------------------------------------------
www.mariner9.net

..... for my music and graphics.
---------------------------------------------------------------
'I spilled spot remover on my dog. He's gone now. '
'I went to a restaurant that serves "breakfast at any time."
So I ordered french toast during the Renaissance. '

 - Steven Wright.

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"Andy Cocker" <big### [at] mariner9fsnetcouk> wrote in message
news:3a21113c@news.povray.org...
>
> > What were the settings for the area light?  jitter used? adaptive?  I was
> surprised it didn't look as though
> > the usual flying pixel effect from jitter was obvious, so I figured maybe
> it had a large number of light
> > sources instead.
>
> Barely altered code from Warp's original file:
>
>     light_source
>     { 0, 1 area_light x*1,z*1,10,10 adaptive 0 jitter  media_interaction on
> media_attenuation on
>     }
>
> Didn't use ORIENT.. maybe that would have avoided the prob.

Maybe it was the adaptive needing to be 1 or more (?)
If orient, or another untamed feature, had been used then I'd have suspected that to
be potential trouble.  It
almost looks like the table edges are faulty but that's probably not the case.  Unless
of course there is any
coincident surfaces there.  If not, that leaves the area light.  Hm, just had a
thought.  Is the area light
fully within the bounds of the cutout in the ceiling, or does it reach beyond any?

Bob

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"Bob H."
<per### [at] aolcom?subject=PoV-News:%20&body=Relating%20to%20POV-Ray:>
wrote in

> Maybe it was the adaptive needing to be 1 or more (?)

I've never altered adaptive from 0.. i'll check the docs on this.

>Hm, just had a thought.  Is the area light
> fully within the bounds of the cutout in the ceiling, or does it reach
beyond any?

Ceiling cutout is box {<-1.2,-1.1,-3>,<1.2,1.1,3>},  so no problems there.
Definitely a problem with the use of an area light and how it becomes more
exposed gradually from behind the ceiling I think, although my brain won't
let me think exactly how.

Andy Cocker

---------------------------------------------------------------
www.mariner9.net

..... for my music and graphics.
---------------------------------------------------------------
'I spilled spot remover on my dog. He's gone now. '
'I went to a restaurant that serves "breakfast at any time."
So I ordered french toast during the Renaissance. '

 - Steven Wright.

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