Well I've been putting a lot of work into the volcano, though I've hardly 
touched anything else in the scene. As you can see I've incorporated a lot 
of the great suggestions from folks round here, thanks everyone! The only 
problems I have with the volcano now are: it's still too dark - I didn't 
realise until after this lengthy render, and there's lava touching snow in 
the foreground which is obviously complete nonsense! Next I'm going to work 
on the smoke and under-sea area.

My favourite bit in this is the lava rivers, which work using a really 
simplistic particle system that basically rolls a particle down the volcano 
leaving a trail of blobs behind it. Slight adjustments to the start position 
and random seed make it take radically different paths, which actually looks 
pretty realistic.

Anyway I thought I'd post this for further comments, and so you can see how 
much better it's got!

-- 
Tek
http://evilsuperbrain.com

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Attachments:
Download 'volcano.jpg' (313 KB)

Preview of image 'volcano.jpg'

This just keeps getting better and better.  My suggestion (worth every 
penny) would be to scrap the undersea section, extend the water to the 
bottom of the picture, and add some icebergs or a frozen shoreline. 
You've just about got the "fire" part working but I think the "ice" part 
needs work.

Awesome picture!

Tek wrote:
> Well I've been putting a lot of work into the volcano, though I've hardly 
> touched anything else in the scene. As you can see I've incorporated a lot 
> of the great suggestions from folks round here, thanks everyone! The only 
> problems I have with the volcano now are: it's still too dark - I didn't 
> realise until after this lengthy render, and there's lava touching snow in 
> the foreground which is obviously complete nonsense! Next I'm going to work 
> on the smoke and under-sea area.
> 
> My favourite bit in this is the lava rivers, which work using a really 
> simplistic particle system that basically rolls a particle down the volcano 
> leaving a trail of blobs behind it. Slight adjustments to the start position 
> and random seed make it take radically different paths, which actually looks 
> pretty realistic.
> 
> Anyway I thought I'd post this for further comments, and so you can see how 
> much better it's got!
> 
>

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The top part is starting to look half way decent now. The mountain looks 
good, the clouds are good, the lava isn't quite right yet. (Good shape, 
lighting looks wrong.)

The underwater part still needs work.

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> My favourite bit in this is the lava rivers, which work using a really
> simplistic particle system that basically rolls a particle down the
> volcano leaving a trail of blobs behind it. Slight adjustments to the
> start position and random seed make it take radically different
> paths, which actually looks pretty realistic.

That's a neat trick.  It might look more realistic if the lava streams were 
brighter maybe?

Post a reply to this message

Tek wrote:

> Well I've been putting a lot of work into the volcano, though I've hardly
> touched anything else in the scene. As you can see I've incorporated a lot
> of the great suggestions from folks round here, thanks everyone! The only
> problems I have with the volcano now are: it's still too dark - I didn't
> realise until after this lengthy render, and there's lava touching snow in
> the foreground which is obviously complete nonsense! Next I'm going to
> work on the smoke and under-sea area.
> 
> My favourite bit in this is the lava rivers, which work using a really
> simplistic particle system that basically rolls a particle down the
> volcano leaving a trail of blobs behind it. Slight adjustments to the
> start position and random seed make it take radically different paths,
> which actually looks pretty realistic.
> 
> Anyway I thought I'd post this for further comments, and so you can see
> how much better it's got!
> 

Coming along neatly, but ( sorry, there's always one of those ) :)

4 things above the water that caught my eye 
No distinct column of smoke/dust/ash over the vent
The boulders/rocks that come flying out of the volcano all are(look like)
the same size.
No smoke/dust plumes where they hit the ground
No steam where the lava touches the water

under water

The bulging lava doesn't seem connected to the volcano

-- 
Ger

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It's great to see this progressing so nicely. Really dig those clouds.

How about an "air glow" above the volcano's spout? And perhaps some more
yellow (and/or "crustiness") in the lave streams? As lava cools, it shows
dark crusty spots on top.

Thanks for keeping us updated!

Ken

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I'd expect the lava streams to be broader at the bottom of the mountain. 
And I love Spock's idea with the ice on the water instead of the cooling 
lava.

Aside from that - Great progress!


Florian

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Tek wrote:
> 
> Anyway I thought I'd post this for further comments, and so you can see how 
> much better it's got!
> 

Ok, forget my earlier comments partly. I'm still disturbed about that
there's _one_ glowing lava drop underwater, but not another even near.
And the mountains at background are still exported from Egypt :). All
other things I mentioned you seem to have maintained with honour.

But maybe there should be steam (and boiling?), where the lava river
gets into the water?

-- 
Eero "Aero" Ahonen
   http://www.zbxt.net
      aer### [at] removethiszbxtnetinvalid

Post a reply to this message

> But maybe there should be steam (and boiling?), where the lava river
> gets into the water?

Weirdly, when lava hits water, it doesn't seem to boil much. Just tones 
of steam. (Which is maybe why you can't see any bubbling?) Strange but 
true...

I rephrase: in the videos I've seen, that's how it looks.


PS. Every time I see "lava" I keep thinking "Java"... I need help!!

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"Orchid XP v2" <voi### [at] devnull> wrote in message
news:43dcc0de@news.povray.org...
> > But maybe there should be steam (and boiling?), where the lava river
> > gets into the water?
>
> Weirdly, when lava hits water, it doesn't seem to boil much. Just tones
> of steam. (Which is maybe why you can't see any bubbling?) Strange but
> true...

Probably because boiling involves small abouts of water changing to steam
beneath the surface and bubbling to the surface. When lava (few hundred
degrees C) hits water the water turns en-mass to steam instantly. There
isn't time to boil.

My guess, not scientific proof.

Post a reply to this message

"Tek" <tek### [at] evilsuperbraincom> wrote in message
news:43dbaf21@news.povray.org...
> Well I've been putting a lot of work into the volcano, though I've hardly
> touched anything else in the scene.

Very nice.

I'll echo a couple of others. Scrap the underwater and just focus on above.
At the moment it's a split image with two disconnected points of focus.

Some ice on the water, steam where the lava hits the ocean, glow around the
top and it'll look very nice.

Post a reply to this message

The bit underwater is just a placeholder! if you compare it to the first WIP 
you'll see it hasn't changed, honestly it's just a bunch of spheres I threw 
down there to remind me to come back later and put something in. I should 
probably have mentioned that!

The other suggestions are good though, I'm going to try to do all of them.

-- 
Tek
http://evilsuperbrain.com


"Ger" <No.### [at] ThankYou> wrote in message news:43dbfbb9@news.povray.org...
> Tek wrote:
>
>> Well I've been putting a lot of work into the volcano, though I've hardly
>> touched anything else in the scene. As you can see I've incorporated a 
>> lot
>> of the great suggestions from folks round here, thanks everyone! The only
>> problems I have with the volcano now are: it's still too dark - I didn't
>> realise until after this lengthy render, and there's lava touching snow 
>> in
>> the foreground which is obviously complete nonsense! Next I'm going to
>> work on the smoke and under-sea area.
>>
>> My favourite bit in this is the lava rivers, which work using a really
>> simplistic particle system that basically rolls a particle down the
>> volcano leaving a trail of blobs behind it. Slight adjustments to the
>> start position and random seed make it take radically different paths,
>> which actually looks pretty realistic.
>>
>> Anyway I thought I'd post this for further comments, and so you can see
>> how much better it's got!
>>
>
> Coming along neatly, but ( sorry, there's always one of those ) :)
>
> 4 things above the water that caught my eye
> No distinct column of smoke/dust/ash over the vent
> The boulders/rocks that come flying out of the volcano all are(look like)
> the same size.
> No smoke/dust plumes where they hit the ground
> No steam where the lava touches the water
>
> under water
>
> The bulging lava doesn't seem connected to the volcano
>
> -- 
> Ger

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I think I explained all this in an earlier post, though I should have said 
when I posted this picture, allow me to reiterate:

1/ The mountains and undersea areas are just placeholders (cones and 
spheres) until I get round to working on them, frankly I'm amazed people 
keep commenting on them! To me they look so obviously unfinished.

2/ That isn't a drop of lava underwater, it's one of those underwater lava 
vents where lava's escaping through a small crack underwater and solidifying 
on the outside almost immediately, but the pressure of the lava keeps 
cracking the solid surface so more of it can break through. This is why it's 
so far from the volcano, it hasn't fallen there it's come up from 
underground.

-- 
Tek
http://evilsuperbrain.com

"Eero Ahonen" <aer### [at] removethiszbxtnetinvalid> wrote in message 
news:43dcaf24$1@news.povray.org...
> Tek wrote:
>>
>> Anyway I thought I'd post this for further comments, and so you can see 
>> how
>> much better it's got!
>>
>
> Ok, forget my earlier comments partly. I'm still disturbed about that
> there's _one_ glowing lava drop underwater, but not another even near.
> And the mountains at background are still exported from Egypt :). All
> other things I mentioned you seem to have maintained with honour.
>
> But maybe there should be steam (and boiling?), where the lava river
> gets into the water?
>
> -- 
> Eero "Aero" Ahonen
>   http://www.zbxt.net
>      aer### [at] removethiszbxtnetinvalid

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I'm going to keep disagreeing with people about the underwater area until I 
get round to working on it. Personally I think it's the most important part 
of the whole image because it shows the cold beating the lava, which 
balances out what's happening above.

I guess I should work on that next so people can see what it's supposed to 
look like and see if they still disagree with me :)

-- 
Tek
http://evilsuperbrain.com

"Gail Shaw" <gshaw AT sentechsa com> wrote in message 
news:43dccf35@news.povray.org...
>
> "Tek" <tek### [at] evilsuperbraincom> wrote in message
> news:43dbaf21@news.povray.org...
>> Well I've been putting a lot of work into the volcano, though I've hardly
>> touched anything else in the scene.
>
> Very nice.
>
> I'll echo a couple of others. Scrap the underwater and just focus on 
> above.
> At the moment it's a split image with two disconnected points of focus.
>
> Some ice on the water, steam where the lava hits the ocean, glow around 
> the
> top and it'll look very nice.
>
>

Post a reply to this message

"Tek" <tek### [at] evilsuperbraincom> wrote in message 
news:43dd383a@news.povray.org...
> I'm going to keep disagreeing with people about the underwater area until 
> I get round to working on it. Personally I think it's the most important 
> part of the whole image because it shows the cold beating the lava, which 
> balances out what's happening above.

Tek,
Expect to see a lot of boiling at the undersea vent.
For form google 'black smoker' - those chimneys are heaps of fun...  and a 
modelling challenge.
http://images.google.com/images?q=black+smoker&hl=en&btnG=Search+Images
D

Post a reply to this message

"dlm" <me### [at] addressinvalid> a écrit dans le message de
news:43dd5795$1@news.povray.org...
>
> Tek,
> Expect to see a lot of boiling at the undersea vent.
> For form google 'black smoker' - those chimneys are heaps of fun...  and a
> modelling challenge.
> http://images.google.com/images?q=black+smoker&hl=en&btnG=Search+Images
> D
>

I think Tek intents that kind of cushion lava
http://satftp.soest.hawaii.edu/space/hawaii/vfts/pele/page.s2.html

As you can see water pressure and temperature conditions prevents water to
boil further than 1 inch away the  forming crust.
Steam condensates and bubbles shrink as soon as formed.

Marc

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It's looking real good...

Quick thought:  The lava will cool as goes downhill.  That should make it
change from yellow to red and from bright to dim as it gets farther away
from the heat source.

Jon

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Tek wrote:
>
> 1/ The mountains and undersea areas are just placeholders (cones and 
> spheres) until I get round to working on them, frankly I'm amazed people 
> keep commenting on them! To me they look so obviously unfinished.

I thought it's not even near of finishing, but I guessed that you'd want
visions of the image (I would've). My apologies, if I was so wrong.

> 2/ That isn't a drop of lava underwater, it's one of those underwater lava 
> vents where lava's escaping through a small crack underwater and solidifying 
> on the outside almost immediately, but the pressure of the lava keeps 
> cracking the solid surface so more of it can break through. This is why it's 
> so far from the volcano, it hasn't fallen there it's come up from 
> underground.

Ah. For my eye, it looked like a stone for my eye. But after all, I
didn't even realize that those cracks exist (thou it's logical, while
thinking it now).

-- 
Eero "Aero" Ahonen
   http://www.zbxt.net
      aer### [at] removethiszbxtnetinvalid

Post a reply to this message

Marc Jacquier wrote:
>
> I think Tek intents that kind of cushion lava
> http://satftp.soest.hawaii.edu/space/hawaii/vfts/pele/page.s2.html
>

Nice! Now, even I can see (and understand) what's the underwater part
about :).

-- 
Eero "Aero" Ahonen
   http://www.zbxt.net
      aer### [at] removethiszbxtnetinvalid

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"Marc Jacquier" <jac### [at] wanadoofr> a écrit dans le message de
news:43ddf200@news.povray.org...
> I think Tek intents that kind of cushion lava
Pillow should be better than cushion.

Marc

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Yup that's exactly what I mean! I found a good reference site:
http://www.pmel.noaa.gov/vents/nemo/explorer/concepts/pillows.html

There's an awesome video at the bottom of that page, makes me wish I was 
doing an animation!

-- 
Tek
http://evilsuperbrain.com

"Marc Jacquier" <jac### [at] wanadoofr> wrote in message 
news:43de87b7@news.povray.org...
>
> "Marc Jacquier" <jac### [at] wanadoofr> a écrit dans le message de
> news:43ddf200@news.povray.org...
>> I think Tek intents that kind of cushion lava
> Pillow should be better than cushion.
>
> Marc
>
>

Post a reply to this message

It is doing that already but the effect's too subtle so it just looks like 
lighting, I'll crank it up a bit :)

-- 
Tek
http://evilsuperbrain.com

"Jon Buller" <jon### [at] bullersnet> wrote in message 
news:web.43de751c9c2a5cdebe920ef30@news.povray.org...
> It's looking real good...
>
> Quick thought:  The lava will cool as goes downhill.  That should make it
> change from yellow to red and from bright to dim as it gets farther away
> from the heat source.
>
> Jon
>

Post a reply to this message

Orchid XP v2 wrote:
>> But maybe there should be steam (and boiling?), where the lava river
>> gets into the water?
> 
> Weirdly, when lava hits water, it doesn't seem to boil much. Just tones 
> of steam. (Which is maybe why you can't see any bubbling?) Strange but 
> true...

That's the case for ones I've seen.


A few pictures I took in Hawaii
    http://www.geocities.com/ramayer/pics/smoke0.jpg
    http://www.geocities.com/ramayer/pics/smoke2.jpg

And the steam glows really cool at night:
    http://www.geocities.com/ramayer/pics/fire.jpg

You also get really cool cracks in the ground where the Lava shows
through the rocks.
    http://www.geocities.com/ramayer/pics/lavaeyes.jpg
Such cracks might look cool in the foreground.


(sorry for the links to pics; but I can't render anything that cool)

> I rephrase: in the videos I've seen, that's how it looks.

Yeah, that's what it looks like in real life.

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"Orchid XP v2" <voi### [at] devnull> schreef in bericht
news:43dcc0de@news.povray.org...

>
> PS. Every time I see "lava" I keep thinking "Java"... I need help!!

There are lots of mighty volcanoes on Java :-)

Thomas

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>>PS. Every time I see "lava" I keep thinking "Java"... I need help!!
> 
> 
> There are lots of mighty volcanoes on Java :-)

Wait... I thought Java *is* a volcano?!

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Orchid XP v2 wrote:

> Wait... I thought Java *is* a volcano?!

and here I was only thinking it was a class-based programming language.
-- 
~Mike

Things! Billions of them!

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>> Wait... I thought Java *is* a volcano?!
> 
> 
> and here I was only thinking it was a class-based programming language.

...or a full-flavoured coffee. :-P

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