Hey there,

I was reading that page with the tips on Radiosity. One thing he
mentioned was that an object with a super-high ambient value would
actually produce light when radiosity was turned on, even though it'd
have to be a decent size to make an impact on a whole room.

This got me to thinking... What if I had a model of a person sitting in
front of a computer. There is a bitmap of a real screen shot or perhaps
another 3d scene that had been rendered.

If I cranked the ambience on the sceen up, and had that as the only
illumination in the room, do you think that could produce the desired
effect of like in real life if you shot someone in a dark room with
their face and upper body just illuminated by a screen, with most of the
rest of the room lost in darkness...

I'm just trying to judge if that in itself would be enough to produce
that, or if I should stick with some sort of point light or light that
is part of the screen, etc. I was thinking the radiosity would give a
much more realistic image...

But one other thing that comes to mind... Could this create a subtle
"projector" type of feel? I mean if half of the screen was red and the
other half was blue, would it actually make turn the person's face
different colors?

So, it is just a thought... if it'd work, it seems like it could be a
really nice effect without a massive amount of work involved (yeah
right..hehe). Perhaps as part of my experimentation with Poser
figures...

Thanks...
Shawn =)

-------
sha### [at] the-spacom
http://www.the-spa.com/shawn.fumo/
-------

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Shawn Fumo wrote:

> I'm just trying to judge if that in itself would be enough to produce
> that, or if I should stick with some sort of point light or light that
> is part of the screen, etc. I was thinking the radiosity would give a
> much more realistic image...

Not being an expert on radiosity I will add only this - A monitor really
is nothing more that a light source. I personaly would attack this problem
with a filter/transmit image map for the picture on the screen with maybe
a high intensity light source behind it.

For some special effects maybe add just a bit of scattering media to the 
room so that it looks like the colored light from the screen is tracing
a path to the human behind it.

-- 
Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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Shawn Fumo <sha### [at] the-spacom> wrote:
: If I cranked the ambience on the sceen up, and had that as the only
: illumination in the room, do you think that could produce the desired
: effect of like in real life if you shot someone in a dark room with
: their face and upper body just illuminated by a screen, with most of the
: rest of the room lost in darkness...

  AFAIK it should give you that effect (altough you will need _extremely_
high quality settings to get it acceptable; Nathan's patch may do it better
with lower quality (but faster) radiosity settings).

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

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Yes, definitely! Although radiosity is fairly complex and extremely slow so
you'll be tweaking for a loooong time.

--
David   http://thunder.prohosting.com/~davidf
"The paper holds their folded faces to the floor" -Pink Floyd

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