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From: JRG
Subject: Light_sources in light_groups don't cast shadows.
Date: 24 Nov 2001 08:43:41
Message: <3bffa40d@news.povray.org>
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Read the same thread in beta.test for explanation.
This is the scene:
camera
{
location <0, 2, -4>
look_at <0, 0, 0>
}
light_group {
light_source
{
<0, 5, -3>
rgb 1
}
text {ttf "times.ttf" "TEXT" 1,0 pigment {rgb 1} translate <-1,1,-2>}
torus {1.75,0.25 pigment {rgb 1}}
}
The first image shows the bug. The second one shows how it should look (I
commented out the light_group).
--
Jonathan.
Post a reply to this message
Attachments:
Download 'light1.png' (16 KB)
Download 'light2.png' (13 KB)
Preview of image 'light1.png'
Preview of image 'light2.png'
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Interesting because I see the shadowed result here (2nd image) without
changing the scene. (v3.5b7 on P3 WinXP)
"JRG" <jrg### [at] hotmail com> wrote in message
news:3bffa40d@news.povray.org...
> Read the same thread in beta.test for explanation.
>
> The first image shows the bug. The second one shows how it should look (I
> commented out the light_group).
Post a reply to this message
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From: JRG
Subject: Re: Light_sources in light_groups don't cast shadows.
Date: 24 Nov 2001 09:04:21
Message: <3bffa8e5@news.povray.org>
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Maybe it's due to the OS?
"Bob H." <omn### [at] msncom> ha scritto nel messaggio
news:3bffa88f$1@news.povray.org...
> Interesting because I see the shadowed result here (2nd image) without
> changing the scene. (v3.5b7 on P3 WinXP)
>
> "JRG" <jrg### [at] hotmailcom> wrote in message
> news:3bffa40d@news.povray.org...
> > Read the same thread in beta.test for explanation.
> >
> > The first image shows the bug. The second one shows how it should look
(I
> > commented out the light_group).
>
>
>
Post a reply to this message
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From: JRG
Subject: Re: Light_sources in light_groups don't cast shadows.
Date: 24 Nov 2001 09:06:24
Message: <3bffa960@news.povray.org>
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Or are you using any particular ini option?
Perhaps posting your ini settings might be interesting.
"Bob H." <omn### [at] msncom> ha scritto nel messaggio
news:3bffa88f$1@news.povray.org...
> Interesting because I see the shadowed result here (2nd image) without
> changing the scene. (v3.5b7 on P3 WinXP)
>
> "JRG" <jrg### [at] hotmailcom> wrote in message
> news:3bffa40d@news.povray.org...
> > Read the same thread in beta.test for explanation.
> >
> > The first image shows the bug. The second one shows how it should look
(I
> > commented out the light_group).
>
>
>
Post a reply to this message
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From: JRG
Subject: Re: Light_sources in light_groups don't cast shadows.
Date: 24 Nov 2001 09:08:39
Message: <3bffa9e7@news.povray.org>
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I got it. -UL makes it work correctly. A bug indeed.
"Bob H." <omn### [at] msncom> ha scritto nel messaggio
news:3bffa88f$1@news.povray.org...
> Interesting because I see the shadowed result here (2nd image) without
> changing the scene. (v3.5b7 on P3 WinXP)
>
> "JRG" <jrg### [at] hotmailcom> wrote in message
> news:3bffa40d@news.povray.org...
> > Read the same thread in beta.test for explanation.
> >
> > The first image shows the bug. The second one shows how it should look
(I
> > commented out the light_group).
>
>
>
Post a reply to this message
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From: Bob H
Subject: Re: Light_sources in light_groups don't cast shadows.
Date: 24 Nov 2001 09:11:57
Message: <3bffaaad@news.povray.org>
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"JRG" <jrg### [at] hotmailcom> wrote in message
news:3bffa960@news.povray.org...
> Or are you using any particular ini option?
> Perhaps posting your ini settings might be interesting.
No. Just:
; Width of image in pixels. Accepts integer values.
;
Width = 320
;
; Height of image in pixels. Accepts integer values.
;
Height = 240
;
; File format to write render image to.
;
Output_File_Type=N
;
; File Output Buffer (amount to write to memory before writing to disk)
;
Buffer_Output=On
Buffer_Size=4096
;
; Sets minimum number of objects before auto bounding kicks in.
;
Bounding_Threshold = 6
;
; Turn display on
Display=On
Display_Gamma=2.3
;
; Turn verbose mode on
Verbose=On
And I tried bmp, tga, and png file outputs too, all same. Didn't expect any
difference really.
bob h
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From: Mark Wagner
Subject: Re: Light_sources in light_groups don't cast shadows.
Date: 25 Nov 2001 00:51:11
Message: <3c0086cf@news.povray.org>
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Bob H. wrote in message <3bffaaad@news.povray.org>...
>; Sets minimum number of objects before auto bounding kicks in.
>;
>Bounding_Threshold = 6
Try changing this to 0. You've only got two objects in the scene, so
bounding boxes are not used. It might be a problem with the bounding box
code. Use (or non-use) of bounding boxes has been a cause of apparently
platform-dependent behavior before.
--
Mark
Post a reply to this message
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From: bob h
Subject: Re: Light_sources in light_groups don't cast shadows.
Date: 25 Nov 2001 02:12:33
Message: <3c0099e1@news.povray.org>
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"Mark Wagner" <mar### [at] gtenet> wrote in message
news:3c0086cf@news.povray.org...
> Bob H. wrote in message <3bffaaad@news.povray.org>...
>
> >; Sets minimum number of objects before auto bounding kicks in.
> >;
> >Bounding_Threshold = 6
>
> Try changing this to 0. You've only got two objects in the scene, so
> bounding boxes are not used. It might be a problem with the bounding box
> code. Use (or non-use) of bounding boxes has been a cause of apparently
> platform-dependent behavior before.
That changed it alright, very curious. So must be the bounding/light
buffer. Too bad I don't know POV program source code to fix it myself.
I went from 0 up to 6 again and not until 6 did it have a shadow, also was
slower to render of course. Guess I just happened to have that set to the
magic number for this particular example. I'm supposing 4 letters plus a
torus counts as five things.
--
text{ttf"arial","bob h",.1,0pigment{rgb 9}translate<-1,-.2,3>}
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