Dear Avid an Rabid Moray Users:

Is there way I can make my spotlight appear to have a cone of light seem to
emanate from it without haven't to use atmosphere (which seems to low my
rendering way down and adds too much stuff outside my light area)? In other
words I want the light to glow from the lamp to the object it is projected
onto.

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yeah, marry a cone to the light source that matches the cone
shape of the light- fiddle with the textures to get what you
want.  I used this technique in my Fireflies animations.

-peter

Mitchell Waite wrote:
> 
> Dear Avid an Rabid Moray Users:
> 
> Is there way I can make my spotlight appear to have a cone of light seem to
> emanate from it without haven't to use atmosphere (which seems to low my
> rendering way down and adds too much stuff outside my light area)? In other
> words I want the light to glow from the lamp to the object it is projected
> onto.

-- 
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net

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I could not get it to look right. Can you send me a texture that will work?

"Dearmad" <dea### [at] applesnakenet> wrote in message
news:3C41F195.9F58E051@applesnake.net...
> yeah, marry a cone to the light source that matches the cone
> shape of the light- fiddle with the textures to get what you
> want.  I used this technique in my Fireflies animations.
>
> -peter
>
> Mitchell Waite wrote:
> >
> > Dear Avid an Rabid Moray Users:
> >
> > Is there way I can make my spotlight appear to have a cone of light seem
to
> > emanate from it without haven't to use atmosphere (which seems to low my
> > rendering way down and adds too much stuff outside my light area)? In
other
> > words I want the light to glow from the lamp to the object it is
projected
> > onto.
>
> --
> Current obsession: "Ballet pour ma fille."
> http://www.applesnake.net

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I'm not sure what would work specific to your needs.  For what I
needed in Fireflies:  Try a simple high ambiance and high
transperency.  With the latest stuff in POV (I used POlyray)
maybe even some glow.  Kill specularity to 0.  It should be a
very simple texture.  Make sure the cone is as long as you want
the light to be.

If you want fade-off, try a gradient texture along the top to
bottom axis of the cone that fades color from high values to
black... add a *little* noise to it if you like.

HTH

-Peter
-- 
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net

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Do I need a pigment? If so what color? And should I be able to see it when I
click on Preview in the Materials Editor? And do I turn Reflection on? How
about shadows on the cone object, should it be on or off. I find that with
it on and the value set to .20 it is begining to look like a cone. Its not
glowing however.


"Dearmad" <dea### [at] applesnakenet> wrote in message
news:3C41F9AA.81B46EDB@applesnake.net...
> I'm not sure what would work specific to your needs.  For what I
> needed in Fireflies:  Try a simple high ambiance and high
> transperency.  With the latest stuff in POV (I used POlyray)
> maybe even some glow.  Kill specularity to 0.  It should be a
> very simple texture.  Make sure the cone is as long as you want
> the light to be.
>
> If you want fade-off, try a gradient texture along the top to
> bottom axis of the cone that fades color from high values to
> black... add a *little* noise to it if you like.
>
> HTH
>
> -Peter
> --
> Current obsession: "Ballet pour ma fille."
> http://www.applesnake.net

Post a reply to this message

Mitchell Waite wrote:
> 
> Do I need a pigment? If so what color? And should I be able to see it when I

Yes you need a pigment.  COlor?  Depends on what *your* light
looks like.

> click on Preview in the Materials Editor? And do I turn Reflection on? How

Light does in and of itself reflect, correct?  So your light
should probably not reflect either... although that might be an
interesting effect- if the particles you are simulating reflect,
then... maybe, but NO is the quick answer.

> about shadows on the cone object, should it be on or off. I find that with
Off, right?  Just try to imagine what your light would look like
shining through dust.

> it on and the value set to .20 it is begining to look like a cone. Its not
> glowing however.

Not unless you make it glow.  You need to pair it to the actual
light it is trying to make apparent, so that it illuminates at it
shines.  Does that make sense?

A lot about raytracing is thinking of the effect you want, not
how to simulate reality, but the appearence of it.

> 
> "Dearmad" <dea### [at] applesnakenet> wrote in message
> news:3C41F9AA.81B46EDB@applesnake.net...
> > I'm not sure what would work specific to your needs.  For what I
> > needed in Fireflies:  Try a simple high ambiance and high
> > transperency.  With the latest stuff in POV (I used POlyray)
> > maybe even some glow.  Kill specularity to 0.  It should be a
> > very simple texture.  Make sure the cone is as long as you want
> > the light to be.
> >
> > If you want fade-off, try a gradient texture along the top to
> > bottom axis of the cone that fades color from high values to
> > black... add a *little* noise to it if you like.
> >
> > HTH
> >
> > -Peter
> > --
> > Current obsession: "Ballet pour ma fille."
> > http://www.applesnake.net

-- 
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net

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I think I got more confused after reading your answers <wink>. Here is my
cone of light. It actually works but its not that great.

#declare Cone_Light =
   material  // Cone Light
   {
      texture
      {
         pigment
         {
            color rgbt <1.0, 1.0, 1.0, 1.0>
         }
         finish
         {
            ambient 1.0
            diffuse 0.8345
            reflection 0.194233
         }
      }
   }

I have re
As you can see its got a pigment but the color of that is white since
R=G=B=1.0.

I find that reflection must be on for this to work at all, you can see I
have it set to a low value.

And it makes sense for reflection to be on otherwise what would the light
bouce off?

I found turning shadows off was needed or the cone will block the light from
hitting the surface it is shining on.

With ambient up to 1 that should make it glow but it doesn't make it glow in
the air like I had hoped. I don't see a fuzz aroudn the light which is what
I want.

thanks for your help

PS is there some place I can upload my final image so everyone can see it?
"Dearmad" <dea### [at] applesnakenet> wrote in message
news:3C422C3F.3C967128@applesnake.net...
>
>
> Mitchell Waite wrote:
> >
> > Do I need a pigment? If so what color? And should I be able to see it
when I
>
> Yes you need a pigment.  COlor?  Depends on what *your* light
> looks like.
>
> > click on Preview in the Materials Editor? And do I turn Reflection on?
How
>
> Light does in and of itself reflect, correct?  So your light
> should probably not reflect either... although that might be an
> interesting effect- if the particles you are simulating reflect,
> then... maybe, but NO is the quick answer.
>
> > about shadows on the cone object, should it be on or off. I find that
with
> Off, right?  Just try to imagine what your light would look like
> shining through dust.
>
> > it on and the value set to .20 it is begining to look like a cone. Its
not
> > glowing however.
>
> Not unless you make it glow.  You need to pair it to the actual
> light it is trying to make apparent, so that it illuminates at it
> shines.  Does that make sense?
>
> A lot about raytracing is thinking of the effect you want, not
> how to simulate reality, but the appearence of it.
>
> >
> > "Dearmad" <dea### [at] applesnakenet> wrote in message
> > news:3C41F9AA.81B46EDB@applesnake.net...
> > > I'm not sure what would work specific to your needs.  For what I
> > > needed in Fireflies:  Try a simple high ambiance and high
> > > transperency.  With the latest stuff in POV (I used POlyray)
> > > maybe even some glow.  Kill specularity to 0.  It should be a
> > > very simple texture.  Make sure the cone is as long as you want
> > > the light to be.
> > >
> > > If you want fade-off, try a gradient texture along the top to
> > > bottom axis of the cone that fades color from high values to
> > > black... add a *little* noise to it if you like.
> > >
> > > HTH
> > >
> > > -Peter
> > > --
> > > Current obsession: "Ballet pour ma fille."
> > > http://www.applesnake.net
>
> --
> Current obsession: "Ballet pour ma fille."
> http://www.applesnake.net

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Mitchell Waite wrote:

> PS is there some place I can upload my final image so everyone can see it?

povray.binaries.images sound about right?

-- 
Ken Tyler - POV-Ray Technical Assistance Group

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I meant light does NOT reflect in and of itself- arg!
-- 
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net

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now make that cone transparent, kill the reflection, and match
it's exact shape with a spotlight so you get an actual raytraced
light shining in the same spot as the cone..  make the light
slightly smaller so you don't get artifacts on the cone surface.

does this make sense?
-- 
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net

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