Hey, this is fantastic!

Andrew.

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Hi Harold,

Perhaps I'm not understanding you very well, because according to me, the
outer rim is quite rounded. Or perhaps you're saying that it should be less
smooth? Or even more rounded?

Thanks for your comments!

Fernando.


news:3ead45f7$1@news.povray.org...
>
> Great! Wonderful job on modeling the cut glass.
> I like this a lot and it makes good use of POV-Ray's
> capabilities. I would say, not as a criticism, but
> observation, that the caustics seem too bright, too
> intense. However, that may be intentional. Another
> point is that this type of glass has a more sharply
> defined outer rim. I have noticed that it is not easy to
> model with something like sPatch or Hammapatch.
> I think the rim needs to be modeled
>  _
> /  \
>
> with two points close together rather than
>
> /\
>
> with one point, because of the way spline patch
> normals are rendered. Although, I have not tried
> this yet.
>
> Harold

Post a reply to this message

Thanks Andrew :)


news:3ead9494$1@news.povray.org...
> Hey, this is fantastic!
>
> Andrew.

Post a reply to this message

news:slr### [at] zeroppsorguk...
> On Mon, 28 Apr 2003 09:41:39 -0500, Fernando Gonzalez del Cueto wrote:
> > I made this scene some months ago, and decided to re-render it with
higher
> > settings and different textures and tweakings.
> >
> > It has some focal blur, I might retry it with a higher focal blur.
> >
> > Time to render 29 hours.
> >
> > I hope you like it. Comments/suggestions are welcomed.
>
> That concrete is beautiful.

Thanks Steve, I'm glad you liked it :)

Post a reply to this message

de noticias 3ead3db1@news.povray.org...
> I made this scene some months ago, and decided to re-render it with higher
> settings and different textures and tweakings.
>
> It has some focal blur, I might retry it with a higher focal blur.
>
> Time to render 29 hours.
>
> I hope you like it. Comments/suggestions are welcomed.

Muy bueno Fernando!!!
It's a great image, and I also think the ground is great
(my daughters also do so), and the glasses are very well
modelled, with a lot of detail (Rhino?).
The caustics are a bit exagerated but I love photons ;-).
Don't keep such beauties in your HD.
Show us more.
Bye

Txemi Jendrix
http://www.txemijendrix.com

Post a reply to this message

Yes, I am saying it should look less rounded. When rendered the glass
appears very thick, as if it becomes a little thicker near the rim, which is
not true of a real glass, actually the opposite is true. I have seen this
as an artifact when I render glasses modeled in sPatch or Hammapatch.
How did you model these?

Harold

"Fernando Gonzalez del Cueto" <fgd### [at] hotmailcom> wrote in message
news:3ead9ba2$1@news.povray.org...
> Hi Harold,
>
> Perhaps I'm not understanding you very well, because according to me, the
> outer rim is quite rounded. Or perhaps you're saying that it should be
less
> smooth? Or even more rounded?
>
> Thanks for your comments!
>
> Fernando.
>

> news:3ead45f7$1@news.povray.org...
> >
> > Great! Wonderful job on modeling the cut glass.
> > I like this a lot and it makes good use of POV-Ray's
> > capabilities. I would say, not as a criticism, but
> > observation, that the caustics seem too bright, too
> > intense. However, that may be intentional. Another
> > point is that this type of glass has a more sharply
> > defined outer rim. I have noticed that it is not easy to
> > model with something like sPatch or Hammapatch.
> > I think the rim needs to be modeled
> >  _
> > /  \
> >
> > with two points close together rather than
> >
> > /\
> >
> > with one point, because of the way spline patch
> > normals are rendered. Although, I have not tried
> > this yet.
> >
> > Harold
>
>

Post a reply to this message

Hi Christoph,

Actually the lighting of the bitmap was quite uniform. I manipulated the
imagemap to make it a bumpmap, highlighting only the cracks and fissures of
the stone.

But you're right, it is not flawless. Also, you can see that the tiles are
the same. Fortunately, it is not quite evident until you begin to inspect
the image more carefully.

Thanks for your comments,

Fernando.


news:3EAD5633.FE2C5CAE@gmx.de...
>
>
> Fernando Gonzalez del Cueto wrote:
> >
> > I made this scene some months ago, and decided to re-render it with
higher
> > settings and different textures and tweakings.
> >
> > It has some focal blur, I might retry it with a higher focal blur.
> >
> > Time to render 29 hours.
> >
> > I hope you like it. Comments/suggestions are welcomed.
>
> Good modelling work on the glass but the ground shows all indications for
> poor usage of image maps.  Don't take this too seriously, it is very
> difficult to make well and i have seen a lot of pictures by professionals
> that were much worse, none the less i like to point it out.
>
> The main problems about image maps for rough surfaces like this are:
>
> - the inherent lighting of the image maps does not harmonize with the
> scene.  Possible solutions are to either use an image map with a lighting
> very similar to that in the scene (quite impossible for caustics like
> this) or to remove the lighting from the image map.  For very rough
> surfaces this is nearly impossible, in any case it usually requires a lot
> of handwork and experience (Kari Kivisalo did some quite impressive tests
> for that).
> - when the image map is only applied to a flat surface, possibly with a
> bump map derived from it, the surface lacks self shadowing effects which
> are quite important for realistic appearance.
>
> Christoph
>
> --
> POV-Ray tutorials, include files, Sim-POV,
> HCR-Edit and more: http://www.tu-bs.de/~y0013390/
> Last updated 28 Feb. 2003 _____./\/^>_*_<^\/\.______

Post a reply to this message

Very nice - esp the floor, nice touch.
-- 
Rick

Kitty5 NewMedia http://Kitty5.co.uk
POV-Ray News & Resources http://Povray.co.uk
TEL : +44 (01270) 501101 - FAX : +44 (01270) 251105 - ICQ : 15776037

PGP Public Key
http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x231E1CEA

Post a reply to this message

Fernando Gonzalez del Cueto wrote:
> 
> Hi Christoph,
> 
> Actually the lighting of the bitmap was quite uniform. I manipulated the
> imagemap to make it a bumpmap, highlighting only the cracks and fissures of
> the stone.

Uniform lighting does not help in this scene, the caustics result in very
non-uniform illumination.  I think it much looks as if the ground is a
photo of a rough cracked concrete ground and not the material itself.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 28 Feb. 2003 _____./\/^>_*_<^\/\.______

Post a reply to this message

Hola Txemi,

Thanks! No, I didn't model them in Rhino, but in the lathe editor built in
Moray.

Yes, I think the caustics are also a bit too strong, and in my current
render I'm using lower settings.

The bad thing is it takes forever in each render, so I cannot tweak very
often :)

Thanks again,

Fernando.



news:3eadafb9@news.povray.org...

mensaje
> de noticias 3ead3db1@news.povray.org...
> > I made this scene some months ago, and decided to re-render it with
higher
> > settings and different textures and tweakings.
> >
> > It has some focal blur, I might retry it with a higher focal blur.
> >
> > Time to render 29 hours.
> >
> > I hope you like it. Comments/suggestions are welcomed.
>
> Muy bueno Fernando!!!
> It's a great image, and I also think the ground is great
> (my daughters also do so), and the glasses are very well
> modelled, with a lot of detail (Rhino?).
> The caustics are a bit exagerated but I love photons ;-).
> Don't keep such beauties in your HD.
> Show us more.
> Bye
>
> Txemi Jendrix
> http://www.txemijendrix.com
>
>
>
>

Post a reply to this message