I don't know what the name for this effect is, but a lot of adverts seem to
be using it.

The best example I can this of is from Lord of the Rings: Fellowship of the
Ring. (If you haven't seen this, the next bit won't make sense.) Just after
Frodo & co fall down the bank and find the bunch of mushrooms, Frodo looks
down the road, and yells at the others to "get off the road".

But anyway, as he looks down the road, they do a camera trick where the
foreground seems to move away, and yet the background gets nearer.

Anyway, after that long and convoluted description... what's this trick
called, and can POV-Ray do it? (That's all I wanted to know. *heh*)

Andrew.

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Andrew Coppin <orp### [at] btinternetcom> wrote:
> But anyway, as he looks down the road, they do a camera trick where the
> foreground seems to move away, and yet the background gets nearer.

  Sounds like the "vertigo" effect (or sometimes called "contra-zoom") used
in many movies (most notably in the Hitchcock's "Vertigo" movie for first
time).
  Usually the effect is done so that the foreground seems to stay where
it is but the background seems to move away. What you describe sounds
like the inverse of this effect, but the principle is exactly the same.

  The way to achieve this effect (if it really is what you are looking
for) is very simple: Move the camera away from the look_at point and
decrease the viewing angle at the same time (or if you want the
"classical" effect, do it the other way around).

-- 
plane{-x+y,-1pigment{bozo color_map{[0rgb x][1rgb x+y]}turbulence 1}}
sphere{0,2pigment{rgbt 1}interior{media{emission 1density{spherical
density_map{[0rgb 0][.5rgb<1,.5>][1rgb 1]}turbulence.9}}}scale
<1,1,3>hollow}text{ttf"timrom""Warp".1,0translate<-1,-.1,2>}//  - Warp -

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On Sat, 8 Mar 2003 18:09:03 -0000, "Andrew Coppin"
<orp### [at] btinternetcom> said:

>I don't know what the name for this effect is, but a lot of adverts seem to
>be using it.
>
>The best example I can this of is from Lord of the Rings: Fellowship of the
>Ring. (If you haven't seen this, the next bit won't make sense.) Just after
>Frodo & co fall down the bank and find the bunch of mushrooms, Frodo looks
>down the road, and yells at the others to "get off the road".
>
>But anyway, as he looks down the road, they do a camera trick where the
>foreground seems to move away, and yet the background gets nearer.
>
>Anyway, after that long and convoluted description... what's this trick
>called, and can POV-Ray do it? (That's all I wanted to know. *heh*)
>
>Andrew.
>

I don't know what that effect is called, but I imagine POV-Ray could
do it in an animation.  The trick is to dolly the camera away from the
subject while simultaneously zooming in at a rate to match (or you can
dolly forward while zooming out, it's equivalent).

---
Bob Chmilnitzky (a.k.a. Jet Jaguar)
I have a spam blocking address.  Replying to me is like pulling teeth.
Visit my crappy home page at http://home.att.net/~chmilnir/
MSTie #54297

Crossposting makes Baby Jesus cry.

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Thanks folks! Will try later...

Andrew.

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"Warp" <war### [at] tagpovrayorg> wrote in message news:3e6a4f7b@news.povray.org...
>
>   Sounds like the "vertigo" effect (or sometimes called "contra-zoom") used
> in many movies (most notably in the Hitchcock's "Vertigo" movie for first
> time).
>   Usually the effect is done so that the foreground seems to stay where
> it is but the background seems to move away. What you describe sounds
> like the inverse of this effect, but the principle is exactly the same.

Tchh - I always thought Jaws was the first (famous shot of Brody on the beach).
Live and learn.

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The shifting focus technique was used for the first time in Niel
Alexander's 1998 IRTC-anim entry (poolshrk.mpg). It was done using POV and
comes with the source. Check it out.

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