"Tom Melly" <tom### [at] tomandlucouk> wrote :
> It's certainly tricky to work out what they've done with the light. It says
> "pointlight", but the shape looks more like a spotlight.
                                                ^^^^^^^^^

interesting, why do you think, it's a spotlight?
I see currently no argument to state that ... I'm interested
in the details, why you think it is one ...

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"Jan Walzer" <jan### [at] lzernet> wrote in message news:3ccd735e@news.povray.org...
> "Tom Melly" <tom### [at] tomandlucouk> wrote :
> > It's certainly tricky to work out what they've done with the light. It says
> > "pointlight", but the shape looks more like a spotlight.
>                                                 ^^^^^^^^^
>
> interesting, why do you think, it's a spotlight?
> I see currently no argument to state that ... I'm interested
> in the details, why you think it is one ...
>

If you look at the back wall and the ceiling, it seems round with a defined
edge? Ignore the light falling on the statue, and just look at the brightest
light on the back wall/ceiling.

Of course, the same effect could be achieved by placing the pointlight on the
other side of a round window.

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"Tom Melly" <tom### [at] tomandlucouk> wrote :
> > > It's certainly tricky to work out what they've done with the light. It says
> > > "pointlight", but the shape looks more like a spotlight.
> >                                                 ^^^^^^^^^
> >
> > interesting, why do you think, it's a spotlight?

> If you look at the back wall and the ceiling, it seems round with a defined
> edge? Ignore the light falling on the statue, and just look at the brightest
> light on the back wall/ceiling.
>
> Of course, the same effect could be achieved by placing the pointlight on the
> other side of a round window.

I don't think, this is the shape of a spotlight, what you mean.
I also see this, but this can be achieved by the use of normal
pointlights.

BTW: here's my recent (fast) try ...

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Attachments:
Download 'athene.jpg' (16 KB)

Preview of image 'athene.jpg'

"Tom Melly" <tom### [at] tomandlucouk> wrote :
> If you look at the back wall and the ceiling, it seems round with a defined
> edge? Ignore the light falling on the statue, and just look at the brightest
> light on the back wall/ceiling.

I can create this shape of the light quite good ...

it's a pity, that the rest of the room doesn't nearly look
as I want it to ...

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Attachments:
Download 'athene_room.jpg' (10 KB)

Preview of image 'athene_room.jpg'

"Jan Walzer" <jan### [at] lzernet> wrote in message
news:3ccd8168@news.povray.org...
>
> I can create this shape of the light quite good ...
>
> it's a pity, that the rest of the room doesn't nearly look
> as I want it to ...
>

Ah - of course, I'd forgotten about the fade power. I'd still be tempted to
try putting the light around the corner so that only diffuse lighting hits
the statue... (assuming you haven't already done that).

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"Tom Melly" <tom### [at] tomandlucouk> wrote :
> Ah - of course, I'd forgotten about the fade power. I'd still be tempted to
> try putting the light around the corner so that only diffuse lighting hits
> the statue... (assuming you haven't already done that).

nope, I've not done that, but you can see in the orig, that
the statue and big parts of the floor are directly illuminated
by the lightsource, because there's one sharp shadow for each
object. I don't believe, that brazil is that good, that it can
produce such sharp shadows with such a rendertime ...

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"Jan Walzer" <jan### [at] lzernet> wrote in message
news:3ccd84c8@news.povray.org...
>
> nope, I've not done that, but you can see in the orig, that
> the statue and big parts of the floor are directly illuminated
> by the lightsource, because there's one sharp shadow for each
> object. I don't believe, that brazil is that good, that it can
> produce such sharp shadows with such a rendertime ...
>

Yep - the thought had occured. I even wondered if the sharp shadows might be
an indication of a brazil weakness - sharp shadows from such a diffuse light
should be a no-no.

Well, if it's not diffuse lighting, then it looks like a really high, weird,
fade-power.

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Tom Melly wrote:
> 
> "Jan Walzer" <jan### [at] lzernet> wrote in message news:3ccd735e@news.povray.org...
> > "Tom Melly" <tom### [at] tomandlucouk> wrote :
> > > It's certainly tricky to work out what they've done with the light. It says
> > > "pointlight", but the shape looks more like a spotlight.
> >                                                 ^^^^^^^^^
> >
> > interesting, why do you think, it's a spotlight?
> > I see currently no argument to state that ... I'm interested
> > in the details, why you think it is one ...
> >
> 
> If you look at the back wall and the ceiling, it seems round with a defined
> edge? Ignore the light falling on the statue, and just look at the brightest
> light on the back wall/ceiling.
> 
> Of course, the same effect could be achieved by placing the pointlight on the
> other side of a round window.

In POV-Ray, even a spotlight is technically a point light of sorts; the
light emanates from a single point, not from a diffuse surface or array
of points or something like that. Instead of trying to figure out how to
emulate the Brazil lighting with a plain vanilla light (which will, as
pointed out, put way too much light on the statue) why not just use a
spotlight to begin with?

-Xplo

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Could you please let me know where I can get that beautiful Athene model?

Thanks!
George Pantazopoulos


"Jan Walzer" <jan### [at] lzernet> wrote in message
news:3ccc679a@news.povray.org...
> Ok ... now, that I got the model, I can try a bit on
> the lighting.
> I still have the problem, setting upt the lightsource,
> to fit the lighting to the original[1], even without
> the object. I played with fade-power, fade-distance,
> lightness Rad.-settings and what not... I can't get
> the near left wall and the floor be as bright as in the
> original and still have the dark corner in the upper
> background and the "light-blooming" of the floor from the
> left. Interestingly, the most similar resulst I got with
> fade-power=0.5 -- (Does that make sense, what I'm writing?)
> Now, after having a quite satisfying lightsource, I was about
> to tweak the radiosity params, but this is even harder...
> I have big problems, with the time of 8m6sec to get the
> rendered image (even without Focal blur).
>
> But I still believe, this is my fault, and more advanced users
> are probably able to do better. What does our lighting-expert[2]
> say, what he whould advice ? Of course, I also like input from
> others ;)
>
> Jan ...
>
>
> [1]
http://www.trinisica.com/img/gallery/imageviewer.asp?image=brazil/b02x_athen
e_01.jpg&w=480&h=601
>
> [2] Kari, I mean you ... ;)
>
>
>

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> Could you please let me know where I can get that beautiful Athene model?
I believe here: http://www.3dup.com/highmodels/1024/0001.html

cu!
--
camera{location-z*3}#macro G(b,e)b+(e-b)*(C/50)#end#macro L(b,e,k,l)#local C=0
;#while(C<50)sphere{G(b,e),.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1
;#end#end L(y-x,y,x,x+y)L(y,-x-y,x+y,y)L(-x-y,-y,y,y+z)L(-y,y,y+z,x+y)L(0,x+y,
<.5,1,.5>,x)L(0,x-y,<.5,1,.5>,x)               // ZK http://www.povplace.be.tf

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