(Kept the same header for consistency, but this doesn't necessarily have
to be regarded as cigarette smoke.)

Anyway, I tried to make the smoke more straight in the beginning and
more turbulated higher up. Is this animation more like you thought it
should be? Does this animation also have those curls or spiral forms
that you talked about? Or did you mean something different...

Well, not much more to say. Constructive criticism and comments in
general are highly appreciated. :)

Rune
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Attachments:
Download 'cigsmoke2.mpg' (379 KB)

Rune wrote:
> 
> (Kept the same header for consistency, but this doesn't necessarily have
> to be regarded as cigarette smoke.)
> 
> Anyway, I tried to make the smoke more straight in the beginning and
> more turbulated higher up. Is this animation more like you thought it
> should be? Does this animation also have those curls or spiral forms
> that you talked about? Or did you mean something different...
> 
> Well, not much more to say. Constructive criticism and comments in
> general are highly appreciated. :)
> 
> Rune
> --
> 3D images and anims, include files, tutorials and more:
> Rune's World:  http://rsj.mobilixnet.dk (updated Apr 14)
> POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
> POV-Ray Ring:  http://webring.povray.co.uk
> 
>                     Name: cigsmoke2.mpg
>    cigsmoke2.mpg    Type: WMPLAYER File (video/x-mpeg2a)
>                 Encoding: x-uuencode

Looks convincing to me - 

(but doesn't have the typical curly pattern I seem to
remember... maybe it was something in the incense that made me
see it...)

Post a reply to this message

Looking better, but, even though it gets turbulated higher up, it still
doesn't seem to dissipate.  It is keeping somewhat of a 'ribbon' appearance
where the smoke should actually start to spread out.  I've been looking for
a picture to illustrate what I mean, but to no avail yet.
Keep it up though.

-tgq

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I expect it to be much less straight in the beginning.

Also, It looks sort of 2D...

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

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Rune wrote:
> 
> (Kept the same header for consistency, but this doesn't necessarily have
> to be regarded as cigarette smoke.)
> 
> Anyway, I tried to make the smoke more straight in the beginning and
> more turbulated higher up. Is this animation more like you thought it
> should be? Does this animation also have those curls or spiral forms
> that you talked about? Or did you mean something different...
> 
> Well, not much more to say. Constructive criticism and comments in
> general are highly appreciated. :)

I think the upper part of the smoke thinning out looks very good, for the
details about the shape i lack the practical experience.

Christoph

-- 
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TransSkin and more: http://www.tu-bs.de/~y0013390/  
Last updated 05 May. 2002 _____./\/^>_*_<^\/\.______

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dont know if its smoke - but its a lot more like it than the last


--
Rick

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It's better now. There are just some unnatural looking turns half way up,
but I think, if the smoke was part of a complex scene, no one would notice..
As others have said, it looks sort of, like a 2D paper that curls.

>> Nice to see your system moves to beta stage!  :o)
>You're welcome to help testing it if you want.

Yes please, I'd like to see how it actually works! Though I'm a newbie to
such things, and don't know if I can offer any useful feedback. But when my
spaceship / shuttle is finished, I'm going to need smoke from the engine,
and when it lands / take off, so your particle system will find good use,
for many people I think. :o)


Regards,
Hugo

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As a smoker, I can say that this second animation looks very realistic.
True, a greater thinning and spreading out at the top would be even more
realistic, but its damn good now!

However, one little tweak:  (at least on my cigarettes) the smoke starts out
looking like straightened double-helix; thickness on either side and thinner
in the middle. I don't know if this is possible to do, but after looking
closely, that's what it looks like.  :)

Anyway, keep up the awesome work!

-Law

Rune wrote:

> (Kept the same header for consistency, but this doesn't necessarily have
> to be regarded as cigarette smoke.)
>
> Anyway, I tried to make the smoke more straight in the beginning and
> more turbulated higher up. Is this animation more like you thought it
> should be? Does this animation also have those curls or spiral forms
> that you talked about? Or did you mean something different...
>
> Well, not much more to say. Constructive criticism and comments in
> general are highly appreciated. :)
>
> Rune
> --
> 3D images and anims, include files, tutorials and more:
> Rune's World:  http://rsj.mobilixnet.dk (updated Apr 14)
> POV-Ray Users: http://rsj.mobilixnet.dk/povrayusers/
> POV-Ray Ring:  http://webring.povray.co.uk
>
>                     Name: cigsmoke2.mpg
>    cigsmoke2.mpg    Type: Wmplayer File (video/mpg)
>                 Encoding: x-uuencode

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Remco de Korte wrote:
> Looks convincing to me -

Thanks!

> (but doesn't have the typical curly pattern I seem
> to remember... maybe it was something in the incense
> that made me see it...)

I don't know what the typical curly pattern looks like... :/

Rune
--
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TinCanMan wrote:
> Looking better, but, even though it gets turbulated
> higher up, it still doesn't seem to dissipate.

See the attached image. How many blocks can you make out?

The animation is designed to be viewed on a screen where 8 to 12 blocks
can be made out. If you can see more than that, your screen is too
bright, or I have designed the animation in a bad way. Just wondering if
that might be part of the cause when you say that the smoke doesn't
dissipate.

> It is keeping somewhat of a 'ribbon' appearance
> where the smoke should actually start to spread out.

It spreads out a little. Anyway, I'm afraid I can't quite get rid of the
ribbon-like appearance completely, due to the way the smoke is made...

> I've been looking for a picture to illustrate what
> I mean, but to no avail yet. Keep it up though.

I hope you can find a picture to illustrate it! I too have been looking
for pictures of smoke in general, but it's surprizingly hard to find any
IMO.

Rune
--
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Attachments:
Download 'blocks.jpg' (1 KB)

Preview of image 'blocks.jpg'

Slime wrote:
> I expect it to be much less straight in the beginning.

But that's the opposite of what everyone else have been saying about the
last animation. :(

Have I gone from one extreme to the other in this regard?

> Also, It looks sort of 2D...

I know it looks a little ribbon-like. I'm trying to reduce that effect,
but it can't be avoided completely I'm afraid.

Rune
--
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Christoph Hormann wrote:
> I think the upper part of the smoke thinning out
> looks very good

Thanks!

Heh, the responses I get seem to be very diverse... ;)

> for the details about the shape i lack the
> practical experience.

Me too.

Rune
--
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Rick [Kitty5] wrote:
> dont know if its smoke - but its a lot more
> like it than the last

Good then. Any improvement is a good improvement. :)

Rune
--
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Hugo wrote:
> There are just some unnatural looking
> turns half way up

I can see what you mean - I'll see if I can fix that.

> but I think, if the smoke was part of a
> complex scene, no one would notice.

I hope you're right. ;)

> As others have said, it looks sort of,
> like a 2D paper that curls.

Yes, that's because that's what it actually is. I think smoke behaves a
little like that, so I choose to take that approach to the problem.
However, I'm doing my bet to hide the truth and make the 2d paper look
like real smoke...

> Yes please, I'd like to see how it actually works!

I'll send it to you.

> Though I'm a newbie to such things, and don't know
> if I can offer any useful feedback.

Well, simply using it and telling me about your experience will be
helpful. :)

Rune
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Rune's World:  http://rsj.mobilixnet.dk (updated Apr 14)
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"Rune" <run### [at] mobilixnetdk> wrote in message
news:3ce04bfb@news.povray.org...
> (Kept the same header for consistency, but this doesn't necessarily have
> to be regarded as cigarette smoke.)
>
> Anyway, I tried to make the smoke more straight in the beginning and
> more turbulated higher up. Is this animation more like you thought it
> should be? Does this animation also have those curls or spiral forms
> that you talked about? Or did you mean something different...
>
> Well, not much more to say. Constructive criticism and comments in
> general are highly appreciated. :)
>
> Rune

It does look like smoke in a quiet room, yes :)

Post a reply to this message

"Data" <daf### [at] hotmailcom> wrote in message
news:3ce12c35@news.povray.org...
> "Rune" <run### [at] mobilixnetdk> wrote in message
> news:3ce04bfb@news.povray.org...
> > (Kept the same header for consistency, but this doesn't necessarily have
> > to be regarded as cigarette smoke.)
> >
> > Anyway, I tried to make the smoke more straight in the beginning and
> > more turbulated higher up. Is this animation more like you thought it
> > should be? Does this animation also have those curls or spiral forms
> > that you talked about? Or did you mean something different...
> >
> > Well, not much more to say. Constructive criticism and comments in
> > general are highly appreciated. :)
> >
> > Rune
>
> It does look like smoke in a quiet room, yes :)
>
And test 1 looks like smoke in a room with a little bit of air flow (open
window or door nearby)

Post a reply to this message

Hi Rune,

An excellent animation! I think it looks very real. The
only slight problem might be that it seems a little
thick at the start. From my cig days, I remember the
speed of the rising smoke slowing down considerably
as it gets further away from the burning embers. That
would make the smoke quite a bit thinner at the start,
catching up with itself as it cools and slows. And I can
see all the smoke on my monitor and the wonderful
dissipation at the top.

Still, I think it's convincing enough to use in it's present
form. How long does it take to render and on what
hardware?

Great job!
=Bob=

"Rune" <run### [at] mobilixnetdk> wrote in message news:3ce04bfb@news.povray.org...
: (Kept the same header for consistency, but this doesn't necessarily have
: to be regarded as cigarette smoke.)
:
: Anyway, I tried to make the smoke more straight in the beginning and
: more turbulated higher up. Is this animation more like you thought it
: should be? Does this animation also have those curls or spiral forms
: that you talked about? Or did you mean something different...
:
: Well, not much more to say. Constructive criticism and comments in
: general are highly appreciated. :) --Rune

Post a reply to this message

I found a couple of reference photos if it helps.

-tgq

Post a reply to this message

Attachments:
Download 'smoking cigarette.jpg' (7 KB) Download 'ashtray.jpg' (14 KB)

Preview of image 'smoking cigarette.jpg'

Preview of image 'ashtray.jpg'

Lawrence Winstead wrote:
> As a smoker, I can say that this second animation
> looks very realistic.

Thanks!

> True, a greater thinning and spreading out at the top
> would be even more realistic, but its damn good now!

:)

> However, one little tweak:  (at least on my cigarettes)
> the smoke starts out looking like straightened
> double-helix; thickness on either side and thinner in
> the middle. I don't know if this is possible to do,
> but after looking closely, that's what it looks like. :)

It should be possible to do actually. I'll give it a try!

> Anyway, keep up the awesome work!

Thanks for your comments!

Rune
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Data wrote:
> It does look like smoke in a quiet room, yes :)

Yay! :)

Rune
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=Bob= wrote:
> An excellent animation! I think it looks very real.

Thank you! :)

> The only slight problem might be that it seems a
> little thick at the start.

I'll try to fix that.

> Still, I think it's convincing enough to use in it's
> present form. How long does it take to render and on
> what hardware?

I have an Athlon 1700 and it took an hour and a half to render IIRC.

No media is used, but all the transparent bicubic patches are also a bit
slow to render, though nothing compared to how slow media would have
been.

Rune
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Hi Rune,

I've been working on an animation that uses media for
clouds and isosurface water. It takes a while to generate
a couple minutes of movie. I'd like to find a better way
to create animated clouds, do you think your particle
system might be able to work in that regard? I've been
testing out your system just doing the examples you
provided, so I've no real experience with the system
itself yet (soon though).

Thanks!
=Bob=

"Rune" <run### [at] mobilixnetdk> wrote in message news:3ce15933@news.povray.org...
: No media is used, but all the transparent bicubic patches are also a bit
: slow to render, though nothing compared to how slow media would have
: been. -- Rune

Post a reply to this message

TinCanMan wrote:
> I found a couple of reference photos if it helps.

Thanks! These are very useful!

Rune
--
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Hi Bob,

I don't think my particle system is very suitable for creating clouds
I'm afraid. At least I wouldn't know how to do it.

But there are other ways to create fast clouds. I haven't had a look at
it myself yet, but maybe you can use Gilles Tran's clouds posted to
povray.text.scene-files recently.

As for a replacement for isosurface water, that's not a job for a
particle system, but a heightfield with a function image might work
well.

Rune
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Hi Rune,

The isosurface seems to be quick enough, but media
sure is sloooowwwwww....I tried Gilles' clouds, but I sort-of
liked the media ones better (sorry Gilles), especially for
animation. I'm using only a PIII 450, so it's just not enough
for some of these tougher pictures, like media, reflections
and transparencies.

Have a great day!
=Bob=

"Rune" <run### [at] mobilixnetdk> wrote in message news:3ce18724@news.povray.org...
: Hi Bob,
:
: I don't think my particle system is very suitable for creating clouds
: I'm afraid. At least I wouldn't know how to do it.
:
: But there are other ways to create fast clouds. I haven't had a look at
: it myself yet, but maybe you can use Gilles Tran's clouds posted to
: povray.text.scene-files recently.
:
: As for a replacement for isosurface water, that's not a job for a
: particle system, but a heightfield with a function image might work
: well. -- Rune

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On Tue, 14 May 2002 16:16:38 +0200, "Rune" <run### [at] mobilixnetdk>
wrote:

>TinCanMan wrote:
>> Looking better, but, even though it gets turbulated
>> higher up, it still doesn't seem to dissipate.
>
>See the attached image. How many blocks can you make out?

I can't make out any. :-/

Lousy screen -- when increasing the gamma enough to make out those shapes,
the bright white backgrounds and such are instand headache.

-- 
Marc van den Dikkenberg
--
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