6 hours and 32 minutes later...

This was both an excercise in hand coding and an attempt to see if i could
make a lamp that acted as a real light source. sphere_sweeps turned out to
take a long long time(!). I messed up a controll point in there, and i'm
sure you can see it. bah! each of the four globes hanging down contain a
light source. for this version, a 7x7 area light. The wall and floor are
actually the same pigment and its curious to me why they are so different in
brightness. the only lights in this scene are the globes. the globes also
contain a blueish media which aren't entirely as visible as i hoped, and an
IOR of 1.33.

but boy I sure like soft shadows. they could be softer yet, but this will do
for me. if not good enough for you, just squint your eyes :)

Oh, the intent... This was intended to be a magician/wizards lamp. they
wouldn't use a regular electric lamp, would they? I think if i use this in a
scene I'll replace the sphere sweep with a rough approximation of cyliners,
spheres and torii. The media and globe/lights aren't that slow otherwise.

Hmm, photons next? probably would be a bad idea since the light sources are
inside the objects that would refract the photons.


ross

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here's the picture!

thanks,
ross

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Attachments:
Download 'spheresweep.jpg' (70 KB)

Preview of image 'spheresweep.jpg'

> for this version, a 7x7 area light.

Are you using adaptive? To smooth those shadows out, I'd use a 17x17 area
light with adaptive 1.

> The wall and floor are
> actually the same pigment and its curious to me why they are so different
in
> brightness.

Angle from the light.

> Hmm, photons next? probably would be a bad idea since the light sources
are
> inside the objects that would refract the photons.

Right, and the difference (if you used enough photons to do it accurately)
would be incredibly small since the lights are at the center of the
containing sphere.


 - Slime
[ http://www.slimeland.com/ ]

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"Slime" <slm### [at] slimelandcom> wrote in message
news:3df2b3dd$1@news.povray.org...
> > for this version, a 7x7 area light.
>
> Are you using adaptive? To smooth those shadows out, I'd use a 17x17 area
> light with adaptive 1.
>

yes, my area light is as follows
light_source {
color rgb <1,1,1>
area_light <1, 0, 0>, <0, 1, 0>, 7, 7
    adaptive 1
    jitter
}

i may up the size_1 and size_2 if i render it again, like you said. the back
wall is kind of grainy.

> > The wall and floor are
> > actually the same pigment and its curious to me why they are so
different
> in
> > brightness.
>
> Angle from the light.
>

maybe i was just thinking wrong about how light is emitted from an area
light. who am i to question a raytracer though?!

thanks for the advice on the lights

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Ross:

Very interesting modeling on the lamp stand, although
I suppose you would have to drill a hole in the table
to get it to stand like that. ;)

You might want to scale the texture on the
sphere_sweep a little bit?  Just an idea.  Otherwise,
keep the images coming.

Aaron

Aaron Gillies
New York City
x3rxes[*]yahoo.com



Ross Litscher wrote:
> 6 hours and 32 minutes later...
> 
> This was both an excercise in hand coding and an attempt to see if i could
> make a lamp that acted as a real light source. sphere_sweeps turned out to
> take a long long time(!). I messed up a controll point in there, and i'm
> sure you can see it. bah! each of the four globes hanging down contain a
> light source. for this version, a 7x7 area light. The wall and floor are
> actually the same pigment and its curious to me why they are so different in
> brightness. the only lights in this scene are the globes. the globes also
> contain a blueish media which aren't entirely as visible as i hoped, and an
> IOR of 1.33.
> 
> but boy I sure like soft shadows. they could be softer yet, but this will do
> for me. if not good enough for you, just squint your eyes :)
> 
> Oh, the intent... This was intended to be a magician/wizards lamp. they
> wouldn't use a regular electric lamp, would they? I think if i use this in a
> scene I'll replace the sphere sweep with a rough approximation of cyliners,
> spheres and torii. The media and globe/lights aren't that slow otherwise.
> 
> Hmm, photons next? probably would be a bad idea since the light sources are
> inside the objects that would refract the photons.
> 
> 
> ross
> 
>

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scale it larger? i was kind of going for a dark iron kind of look. but it
turned out more of a pewter finish with black paint or something.

"Aaron Gillies" <no### [at] spamcom> wrote in message
news:3DF### [at] spamcom...
> Ross:
>
> Very interesting modeling on the lamp stand, although
> I suppose you would have to drill a hole in the table
> to get it to stand like that. ;)
>
> You might want to scale the texture on the
> sphere_sweep a little bit?  Just an idea.  Otherwise,
> keep the images coming.
>
> Aaron
>
> Aaron Gillies
> New York City
> x3rxes[*]yahoo.com
>
>
>
> Ross Litscher wrote:
> > 6 hours and 32 minutes later...
> >
> > This was both an excercise in hand coding and an attempt to see if i
could
> > make a lamp that acted as a real light source. sphere_sweeps turned out
to
> > take a long long time(!). I messed up a controll point in there, and i'm
> > sure you can see it. bah! each of the four globes hanging down contain a
> > light source. for this version, a 7x7 area light. The wall and floor are
> > actually the same pigment and its curious to me why they are so
different in
> > brightness. the only lights in this scene are the globes. the globes
also
> > contain a blueish media which aren't entirely as visible as i hoped, and
an
> > IOR of 1.33.
> >
> > but boy I sure like soft shadows. they could be softer yet, but this
will do
> > for me. if not good enough for you, just squint your eyes :)
> >
> > Oh, the intent... This was intended to be a magician/wizards lamp. they
> > wouldn't use a regular electric lamp, would they? I think if i use this
in a
> > scene I'll replace the sphere sweep with a rough approximation of
cyliners,
> > spheres and torii. The media and globe/lights aren't that slow
otherwise.
> >
> > Hmm, photons next? probably would be a bad idea since the light sources
are
> > inside the objects that would refract the photons.
> >
> >
> > ross
> >
> >
>

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Aaron Gillies wrote:
>Ross:
>
>Very interesting modeling on the lamp stand, although
>I suppose you would have to drill a hole in the table
>to get it to stand like that. ;)
>

First of all, I love this image.  Great design.  I'd have
half a mind to buy something like this if I saw it in a
store.

Aaron has a good point.  Unless the metal is particularly
dense, the post should not be centered on the base.
Rather, the base should be more centered under the shade,
with the post coming down through a point maybe an inch
or so from the center of the base.  You might also
consider making the base elliptical rather than circular.
Of course, these are just ideas coming off the top of my
head.  You can take them or leave them.

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thanks :) I'll think about the post some more. curving it towards the middle
of the shade starting from the top might be a good idea.


"Mack Tuesday" <mailbjl@yahoo> wrote in message
news:web.3df44e903f7f4aa754f5973f0@news.povray.org...
> Aaron Gillies wrote:
> >Ross:
> >
> >Very interesting modeling on the lamp stand, although
> >I suppose you would have to drill a hole in the table
> >to get it to stand like that. ;)
> >
>
> First of all, I love this image.  Great design.  I'd have
> half a mind to buy something like this if I saw it in a
> store.
>
> Aaron has a good point.  Unless the metal is particularly
> dense, the post should not be centered on the base.
> Rather, the base should be more centered under the shade,
> with the post coming down through a point maybe an inch
> or so from the center of the base.  You might also
> consider making the base elliptical rather than circular.
> Of course, these are just ideas coming off the top of my
> head.  You can take them or leave them.
>
>

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