"Alf Peake" <alf### [at] peake42freeservecouk> wrote in message
news:39a44922@news.povray.org...
|
| Still too many black pixels, even with max_trace_level 85, but AA 0.01
| gets rid of most of them at this resolution. ADC_bailout does'nt help
| much even at 0.05

Just over an hour to render isn't bad.
About the 85 for max trace, were you going by what the statistics show?  I would have
thought that
you could use a third that number easily.  Black dropped out pixels aren't the same as
dark pixels
:-)  I don't see anything wrong in this image anyhow.  Well, except I was trying to
see the blue
caustics and finally realized it looks spread out and less intense as the others.
It's a great glass dragonfly but that rear pair of wings, at the connecting points as
someone
already said, could use a better joining.

Bob

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Bob Hughes <per### [at] aolcom?subject=PoV-News:> wrote in message
news:39ab03d6$1@news.povray.org...
> "Alf Peake" <alf### [at] peake42freeservecouk> wrote in message
news:39a44922@news.povray.org...
> |
> | Still too many black pixels, even with max_trace_level 85, but AA
0.01
> | gets rid of most of them at this resolution. ADC_bailout does'nt
help
> | much even at 0.05
>
> Just over an hour to render isn't bad.
> About the 85 for max trace, were you going by what the statistics
show?  I would have thought that
Yes, I get 85/85, and I realised it was probably overkill on my part
persuing it.

> you could use a third that number easily.  Black dropped out pixels
aren't the same as dark pixels
> :-)  I don't see anything wrong in this image anyhow.  Well, except
I was trying to see the blue
> caustics and finally realized it looks spread out and less intense
as the others.
It is spread. I wasn't happy about poor blue caustics either but
assumed it was something to do with the way RGB values are weighted.
Its clearer with ior 1.2 but I wanted around 1.5

> It's a great glass dragonfly but that rear pair of wings, at the
connecting points as someone
> already said, could use a better joining.
The wings actually do penetrate the red blob, as can be seen in my 26k
jpeg reply to Tor (In this thread I'm only able to reply to my
original post, otherwise post goes to my ISP news server, not
news.pov). I don't know if its a photon thing or not. Will check when
I get the tine :)

Simplified source posted to p.t.s-f

>
> Bob

Alf

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Tor Olav Kristensen <tto### [at] onlineno> wrote in message
news:39AAE38B.A57CEA91@online.no...
>
> Alf Peake wrote:
>
> > (3rd repost, seems I can only reply to my original post)
> >
> > Subject: ReDragonfly revisited 39k
> > Date: 25 August 2000 20:54
> >
> > Tor Olav Kristensen <tto### [at] onlineno> wrote in message
> > news:39A45056.32E778EF@online.no...
> > >
>
> > > There seems to be some problems with the attachment of the
> > > rear wings to the body.
> > Yes, its that blob / camera angle thingy again. Same sort of thing
> > happens with 'lipsoids. I also lose the shadow with some angles.
> > The jpeg shows a close up, camera over left wings, (leading edge
to
> > the left) all other objects removed, tail would be to the right.
The
> > left 2 sections are opaque, no photons, with camera <0,4,-4> and
the
> > right one is clear with photons and camera <0,5,-3>. Note the
right
> > pair of wings do not connect in this one :(
>
> I wasn't aware that there were such problems with blobs.
> Is it a photons-only error, or can it happen to me in standard POV
> as well ?

Happens with me in dos versions of pov3.1g and megapov 0.4
Will post a piece in p.t.s-f  (Dragnfly1.pov)

>
> What are 'lipsoids in POV-ray ?

Superellipsoids. Sorry, my bad habit of shortening words.

>
>
> > See also a larger version, 88k,  of the pic I uploaded here in
March:
> >
> > http://www.peake42.freeserve.co.uk/pix1/dragnfly.jpg
>
> May I ask how you generate that Fibonacci stuff ?
>
> I have a vague memory of a Golden Ratio between the
> number of right turns and the number of left turns (?)

Check this, amongst others, explains better than I can:
http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html
and look for my GoldnRatio in p.b.i later, with source in p.t.s-f

>
>
> Tor Olav
> --
> mailto:tor### [at] hotmailcom
> http://www.crosswinds.net/~tok/tokrays.html
>

Alf

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Alf Peake wrote:

> Tor Olav Kristensen <tto### [at] onlineno> wrote in message
> news:39AAE38B.A57CEA91@online.no...
> ...
> > May I ask how you generate that Fibonacci stuff ?
> >
> > I have a vague memory of a Golden Ratio between the
> > number of right turns and the number of left turns (?)
>
> Check this, amongst others, explains better than I can:
> http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html
> and look for my GoldnRatio in p.b.i later, with source in p.t.s-f
> ...

That's a great web page.

And thank you for posting your GoldenRatio code.
Now I'll go and see if I can blobbyfy it !


Tor Olav
--
mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html

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