Is there a way to get a depth queuing effect in POV? That is, were
objects that are behind other objects get faded into the background
color, or from a certain plane backward through the image, objects are
faded into the background.

Any advice or help is appreciate.

Mike


--
*******************************
Michael DiDonato, PhD
The Scripps Research Institute
Department of Molecular Biology
Maildrop MB4
10550 North Torrey Pines Road
La Jolla, CA, 92037

Tel: (858) 784-9261
FAX: (858) 784-2277
*******************************

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Perhaps try a constant fog in the background colour?

Marc-Hendrik

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Look at the help about fog in the povray documentation.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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The problem with fog is that you can either hav it everywhere or from
the ground up.  I need something  that is like an xy-plane which fades
to the background color along the +ve z-axis.

Mike

Marc-Hendrik Bremer wrote:

> Perhaps try a constant fog in the background colour?
>
> Marc-Hendrik

--
*******************************
Michael DiDonato, PhD
The Scripps Research Institute
Department of Molecular Biology
Maildrop MB4
10550 North Torrey Pines Road
La Jolla, CA, 92037

Tel: (858) 784-9261
FAX: (858) 784-2277
*******************************

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Michael DiDonato wrote in message <3A148789.A5DA4ACE@scripps.edu>...
> The problem with fog is that you can either hav it everywhere or from
> the ground up.  I need something  that is like an xy-plane which fades
> to the background color along the +ve z-axis.


perhaps this sounds hardly but it's really simple - just try rotate
whole world

ABX

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Michael DiDonato wrote:
> 
> The problem with fog is that you can either hav it everywhere or from
> the ground up.  I need something  that is like an xy-plane which fades
> to the background color along the +ve z-axis.
> 

Change the up vector of the ground fog, or use media (probably of the absorbing
type)

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg

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Margus Ramst wrote:

> Michael DiDonato wrote:
> >
> > The problem with fog is that you can either hav it everywhere or from
> > the ground up.  I need something  that is like an xy-plane which fades
> > to the background color along the +ve z-axis.
> >
>
> Change the up vector of the ground fog, or use media (probably of the absorbing
> type)

Ie you want distance from the xy plane, not the camera point, right? I'm not sure
you can do that in standard POV.

--
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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Unfortunately, I think you are right.  Maybe a consideration for a feature in a
future version.

Mike


David Fontaine wrote:

> Margus Ramst wrote:
>
>
> Ie you want distance from the xy plane, not the camera point, right? I'm not sure
> you can do that in standard POV.
>
> --
> David Fontaine  <dav### [at] faricynet>  ICQ 55354965
> My raytracing gallery:  http://davidf.faricy.net/

--
*******************************
Michael DiDonato, PhD
The Scripps Research Institute
Department of Molecular Biology
Maildrop MB4
10550 North Torrey Pines Road
La Jolla, CA, 92037

Tel: (858) 784-9261
FAX: (858) 784-2277
*******************************

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I added this feature in my patch that works for normal fog
and ground fog. The new parameter is 'fog_start', which specify an
offset from the camera. Only to mention that a small bug has been
recently discovered; it affects transparent objects using 'clipped_by'
modifiers.
	Direct page:
http://pov4grasp.free.fr/features/fog_start.php3


*** Nicolas Calimet
*** http://pov4grasp.free.fr

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