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slightly better shape, and a better background :)
but it took 10 minutes to trace this time
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"Luckyly they included a button, right here, that'll blow the entire thing
up!"
Post a reply to this message
Attachments:
Download 'atoombom.jpg' (49 KB)
Preview of image 'atoombom.jpg'
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The right honourable Zeger Knaepen spake:
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
>
> cu!
Wow... how DID you do that?!
--
---
Stefan Viljoen
Software Support Technician / Programmer
Polar Design Solutions
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That looks really, really good Zeger. I mean that.
I saw in your previous post that you are using AOI. I thought about doing
the same thing for modeling a large thunderhead. Its very much faster like
you said, and modeling something like a thunderhead with media is just a
headache waiting to happen. How did you place your AOI sphere (or whatever
surfaces you are using to create the shape), by hand, some sort of macro?
Skip
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Big improvement! How exactly do you use AOI to create that effect? What sort
of surface is the texture on?
- Slime
[ http://www.slimeland.com/ ]
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Zeger Knaepen wrote:
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
Almost AWESOME ROLEX quality... I only miss the explosion lighting
the mountains, but that would need some magic.
I second Skip and Slime requests for the explanation: it should be
really interesting to read...
--
Jaime
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Zeger Knaepen wrote:
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
There is something wrong with the background - it is quite dark although
it seems to be a sunny day. The explosion now is quite bright (which
probably is realistic but i lack the first hand experience here ;-))
So you would expect to see:
- the shadow of the explosion cast by the sun
- the light of the explosion cast on the surrounding.
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 27 Feb. 2005 _____./\/^>_*_<^\/\.______
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Very good indeed.
But a 'bit' too small for a nuclear explosion ! normally, no more mountains
and no more earth..
>Almost AWESOME ROLEX quality... I only miss the explosion lighting
>the mountains, but that would need some magic.
agree
Rene
----
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Zeger Knaepen wrote:
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
Very photo-like, I would only change a bit shape of the "top"
btw, So, I see that topic of Americans attacking Iraq is popular in p.b.i
recently ;)
--
Rafal Maj Raf256
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"Stefan Viljoen" <ryl### [at] polard com> schreef in bericht
news:422d380b@news.povray.org...
> The right honourable Zeger Knaepen spake:
>
> > slightly better shape, and a better background :)
> > but it took 10 minutes to trace this time
> >
> > cu!
>
> Wow... how DID you do that?!
:)
9500 spheres arranged in a mushroom-shape (with a lot of while-loops of
course :)) and seperated into a couple of categories: smoke, dust and 3
types of fire, all textured with a simple texture: something like:
(for the fire)
texture {
pigment {
aoi
color_map {
[0 rgb <1,.6,.4>*2 transmit 1]
[.5 rgb <1,.6,.4>*2 transmit .75]
}
poly_wave .75
}
normal {bumps .5 scale .5 warp {turbulence .5 lambda 3}}
finish {ambient .1 diffuse 1.5 brilliance 2}
}
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"The door on your left. No, your other left!"
Post a reply to this message
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"Skip Talbot" <Ski### [at] aolcom> schreef in bericht
news:422d42e1$1@news.povray.org...
> That looks really, really good Zeger. I mean that.
Thanks!
> I saw in your previous post that you are using AOI. I thought about doing
> the same thing for modeling a large thunderhead. Its very much faster
like
> you said, and modeling something like a thunderhead with media is just a
> headache waiting to happen. How did you place your AOI sphere (or
whatever
> surfaces you are using to create the shape), by hand, some sort of macro?
Well, there are 9500 spheres, so clearly I didn't place them by hand :p
They're all randomly placed, within certain boundaries. Each shape (the
head of the explosion, every shockwave and so on) is a collection of some
while-loops of 30 to 1000 spheres (according to the density of that part).
The next step is to make it animatable :)
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"Use the instrumentpanel, Luke!"
Post a reply to this message
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"Slime" <fak### [at] emailaddress> schreef in bericht
news:422d4c37$1@news.povray.org...
> Big improvement!
thanks :)
> How exactly do you use AOI to create that effect? What sort
> of surface is the texture on?
I tried different things: one big shape with a texture_map, a couple of
blobs with different textures, a couple of merge's of spheres with different
textures and some union's of spheres with different texture. Apparently the
overlapping surfaces you get with union instead of merge are vital to create
a believable gas-effect.
for the texture: see my reply to Stefan :)
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"If we ain't outta here in ten minutes, we won't need no rocket to fly
through space."
Post a reply to this message
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"jaime" <jai### [at] ignoranciaorg> schreef in bericht
news:422d6d2f@news.povray.org...
> Zeger Knaepen wrote:
> > slightly better shape, and a better background :)
> > but it took 10 minutes to trace this time
>
> Almost AWESOME ROLEX quality... I only miss the explosion lighting
> the mountains, but that would need some magic.
well, it actually should be possible... the lighting shouldn't be as
detailed as the mountains really are, so a simplistic model of the
mountains, textured with the background-image, could be used to simulate
lighting.
The only real problem is the shadow of the smoke and dust. The whole
explosion has a no_shadow modifier, because otherwise it renders about 100
times slower :-/
I might be able to fake the shadow too...
> I second Skip and Slime requests for the explanation: it should be
> really interesting to read...
Once it's animatable, I'll post the source :)
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"The ships hang in the air in exactly the same way that bricks don't."
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"Christoph Hormann" <chr### [at] gmxde> schreef in bericht
news:d0jrvg$2nn$1@chho.imagico.de...
> Zeger Knaepen wrote:
> > slightly better shape, and a better background :)
> > but it took 10 minutes to trace this time
>
> There is something wrong with the background - it is quite dark although
> it seems to be a sunny day.
I had to darken it, or the explosion would have been too bright :p
> The explosion now is quite bright (which
> probably is realistic but i lack the first hand experience here ;-))
I think it's still not bright enough to be realistic :)
> So you would expect to see:
>
> - the shadow of the explosion cast by the sun
working on that :)
> - the light of the explosion cast on the surrounding.
should be possible, like I explained in reply to jaime :)
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"Train you will I. Train you I will. Yes! Step one: touch your tongue to
mine."
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"Rene Bui" <ren### [at] freefr> schreef in bericht
news:web.422d77959e24cecb1186d1c30@news.povray.org...
> Very good indeed.
thanks! :)
> But a 'bit' too small for a nuclear explosion ! normally, no more
mountains
> and no more earth..
yes, but it's just beginning! wait a couple of seconds, and, well, you'll
never have to wait again :p
> >Almost AWESOME ROLEX quality... I only miss the explosion lighting
> >the mountains, but that would need some magic.
> agree
about the lighting part or the magic part? :)
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"How will we find this button, sir?"
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"Rafal Maj Raf256" <spa### [at] raf256com> schreef in bericht
news:1737603.GOMX6Qxvpa@raf256com...
> Zeger Knaepen wrote:
>
> > slightly better shape, and a better background :)
> > but it took 10 minutes to trace this time
>
> Very photo-like, I would only change a bit shape of the "top"
yes, I'm not totally happy with it myself, but I'm not sure what's wrong :-/
> btw, So, I see that topic of Americans attacking Iraq is popular in p.b.i
> recently ;)
:) wasn't really thinking of Iraq actually
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"I'm spinning!"
Post a reply to this message
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Zeger Knaepen wrote:
> yes, I'm not totally happy with it myself, but I'm not sure what's wrong :-/
>
Do you know about the ice cap that forms on top? You might try to
hunt down some descriptions from the Los Alamos experiments.
--Scott David Daniels
Sco### [at] AcmOrg
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Some heat-ripplage on the background would be good, I think it would give it
a little bit of scale. Really, really nice, plus renders in only 10 mins(!)
I need to try aoi for smoke.
Beautiful.
-S
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"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:422d0f41@news.povray.org...
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
>
> cu!
> --
> ZK AKA Gaeriel
> http://www.povplace.be.tf
> "Luckyly they included a button, right here, that'll blow the entire thing
> up!"
>
>
>
wow! that's an amazing improvement over the last one. My only feeling is
that the top isn't dense enough.
that is one fine looking explosion.
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"stm31415" <sam### [at] cscom> schreef in bericht
news:web.422db5399e24cecbbed9a71a0@news.povray.org...
> Some heat-ripplage on the background would be good, I think it would give
it
> a little bit of scale.
ah, good idea, I'll try that
> Really, really nice,
thank you :)
> plus renders in only 10 mins(!)
with AA and mosaic-preview, without that it renders in about 6'47" at
800x600 on an athlon 1.1GHz running Windows ME :)
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"You think that's air you're breathing now?"
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"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:422d0f41@news.povray.org...
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
Nice - looks small, but that's okay. Sort of like the nuke explosion in T3
when arnie throws the damaged power-pack out of the van...
Post a reply to this message
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"Ross" <rli### [at] everestkcnet> schreef in bericht
news:422dc8e0$1@news.povray.org...
> wow! that's an amazing improvement over the last one.
Thank you :)
> My only feeling is
> that the top isn't dense enough.
the top is the most difficult part
> that is one fine looking explosion.
:)
I really hope I can animate it
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"Lighting is important. Just like in that movie: Silence Of The Sheep."
Post a reply to this message
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"Tom Melly" <pov### [at] tomandlucouk> schreef in bericht
news:422dcb9d@news.povray.org...
> Nice - looks small, but that's okay. Sort of like the nuke explosion in T3
> when arnie throws the damaged power-pack out of the van...
hmm, what is it that makes it looks small? The background?
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"I am Oobedoob Benubi. I have the silliest name in the galaxy."
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"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:422dd3c6@news.povray.org...
> "Tom Melly" <pov### [at] tomandlucouk> schreef in bericht
> news:422dcb9d@news.povray.org...
> > Nice - looks small, but that's okay. Sort of like the nuke explosion in
T3
> > when arnie throws the damaged power-pack out of the van...
>
> hmm, what is it that makes it looks small? The background?
I think mainly that I'm making an assumption about the scale of both the
background (mainly the mesa on the left), and the ground-objects.
Also, something about the smoke gives an impression of the scale.
I find it hard to pin it down exactly, but basically my brain keeps telling
me that it's about 80ft high...
You could try rendering it on a featureless plain and re-posting - that
might give an idea as to whether the assumed scale is a product of the
scenery or something intrinsic to the explosion.
Post a reply to this message
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"Tom Melly" <pov### [at] tomandlucouk> schreef in bericht
news:422ddf78@news.povray.org...
> I think mainly that I'm making an assumption about the scale of both the
> background (mainly the mesa on the left), and the ground-objects.
>
> Also, something about the smoke gives an impression of the scale.
>
> I find it hard to pin it down exactly, but basically my brain keeps
telling
> me that it's about 80ft high...
after some more research, I think I know what's the problem: as someone
already mentioned, the smoke, dust and fire isn't dense enough to make it
look big. Also the dust-shockwave needs more detail, more structure, and it
should be bigger.
cu!
--
ZK AKA Gaeriel
http://www.povplace.be.tf
"I plan to live forever! ... or die trying..."
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> hmm, what is it that makes it looks small? The background?
Excessive detail in the background makes it look like a model.
Note that the cloud does not look that way, but the background does.
Try putting the background away at a proper distance, scaling it up
appropriately, then a little focal blur.
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Excellent! The improvement from the last version is radical.
Congrats,
Fernando.
Zeger Knaepen wrote:
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
>
> cu!
>
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"Fernando G. del Cueto" <fcu### [at] yahoocom> wrote in message
news:422e15a3$1@news.povray.org...
> Excellent! The improvement from the last version is radical.
>
> Congrats,
Thank you! :)
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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The right honourable Zeger Knaepen spake:
> "Stefan Viljoen" <ryl### [at] polardcom> schreef in bericht
> news:422d380b@news.povray.org...
>> The right honourable Zeger Knaepen spake:
>>
>> > slightly better shape, and a better background :)
>> > but it took 10 minutes to trace this time
>> >
>> > cu!
>>
>> Wow... how DID you do that?!
>
> :)
> 9500 spheres arranged in a mushroom-shape (with a lot of while-loops of
> course :)) and seperated into a couple of categories: smoke, dust and 3
Interesting. The only problem is that if -I- tried it it would still look
like 9500 spheres.... not a very realistic nuclear detonation.
:0
But that's just me!
Keep it up - how about trying a fuel-air explosion next?
Kind regards,
--
---
Stefan Viljoen
Software Support Technician / Programmer
Polar Design Solutions
Post a reply to this message
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Hi,
A lot of the appearance depends on how long it is from detonation.
http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.htm
States:
2.05 The surface temperatures of the fireball, upon which the brightness (or
luminance) depends, do not vary greatly with the total energy yield of the
weapon. Consequently, the observed brightness of the fireball in an air
burst is roughly the same, regardless of the amount of energy released in
the explosion. Immediately after its formation the fireball begins to grow
in size, engulfing the surrounding air. This growth is accompanied by a
decrease in temperature because of the accompanying increase in mass. At the
same time, the fireball rises, like a hot-air balloon. Within seven-tenths
of a millisecond from the detonation, the fireball from a 1-megaton weapon
is about 440 feet across, and this increases to a maximum value of about
5,700 feet in 10 seconds. It is then rising at a rate of 250 to 350 feet per
second. After a minute, the fireball has cooled to such an extent that it no
longer emits visible radiation. It has then risen roughly 4.5 miles from the
point of burst.
and continues to describe color effects etc ...
DLM
"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:422d0f41@news.povray.org...
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
>
> cu!
> --
> ZK AKA Gaeriel
> http://www.povplace.be.tf
> "Luckyly they included a button, right here, that'll blow the entire thing
> up!"
>
>
>
Post a reply to this message
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"dlm" <me### [at] addressinvalid> wrote in message news:4238a729$1@news.povray.org...
> Hi,
> A lot of the appearance depends on how long it is from detonation.
> http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.htm
> States:
>
> 2.05 The surface temperatures of the fireball, upon which the brightness (or
> luminance) depends, do not vary greatly with the total energy yield of the
> weapon. Consequently, the observed brightness of the fireball in an air
> burst is roughly the same, regardless of the amount of energy released in
> the explosion. Immediately after its formation the fireball begins to grow
> in size, engulfing the surrounding air. This growth is accompanied by a
> decrease in temperature because of the accompanying increase in mass. At the
> same time, the fireball rises, like a hot-air balloon. Within seven-tenths
> of a millisecond from the detonation, the fireball from a 1-megaton weapon
> is about 440 feet across, and this increases to a maximum value of about
> 5,700 feet in 10 seconds. It is then rising at a rate of 250 to 350 feet per
> second. After a minute, the fireball has cooled to such an extent that it no
> longer emits visible radiation. It has then risen roughly 4.5 miles from the
> point of burst.
>
>
>
> and continues to describe color effects etc ...
hey, that's interesting! thanks!!
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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I just have to say it looks VERY cool, quit posting photos :)
(that's a scary thought huh?)
Of course, with the new IRTC animation topic, you just HAVE to post source
:) (I'm begging! lol)
== John ==
"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:422d0f41@news.povray.org...
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
>
> cu!
> --
> ZK AKA Gaeriel
> http://www.povplace.be.tf
> "Luckyly they included a button, right here, that'll blow the entire thing
> up!"
>
>
>
Post a reply to this message
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"John D. Gwinner" <joh### [at] cornelledu> wrote in message
news:42683c80$1@news.povray.org...
> I just have to say it looks VERY cool, quit posting photos :)
>
> (that's a scary thought huh?)
:)
I wouldn't want to take a photo of such a thing :)
> Of course, with the new IRTC animation topic, you just HAVE to post source
> :) (I'm begging! lol)
It's not animatable. But someday, the source will be made public! :p
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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"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote:
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
>
> cu!
> --
> ZK AKA Gaeriel
> http://www.povplace.be.tf
> "Luckyly they included a button, right here, that'll blow the entire thing
> up!"
Zeger, you are an explosion god! That is the best nuclear explosion I have
ever seen from POV-Ray! <drooling>
Must...See...Source...File...</drooling>
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