Hi all.

This is my attempt to make an explosion with use of media.

A lot of things to improve (timing, textures, ...), but not so bad...

Any comments/critics/advices ???

Bouf.

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Attachments:
Download 'expl04.mpg' (60 KB)

Very nice! Could you perhaps make it a little less simmetrical and perhaps
have one area bulge more than another, like regular explosions? Oh, and I
suggest you check out H.E. Day's gaseous/flamable explosion macros.

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TonyB wrote:
> 
> Very nice! Could you perhaps make it a little less simmetrical and perhaps
> have one area bulge more than another, like regular explosions? Oh, and I
> suggest you check out H.E. Day's gaseous/flamable explosion macros.

Thanks for your reply.
I'm not glad with enhancements I've done for now, but I'll keep trying,
and will post another mpg as soon as possible.
H.E. Day's macro is a good source of ideas (particulary the shockwave
feature...)

Bouf.

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Bouf wrote:

> Hi all.
>
> This is my attempt to make an explosion with use of media.
>
> A lot of things to improve (timing, textures, ...), but not so bad...
>
> Any comments/critics/advices ???

    One of the best I have seen or perhaps the one that looks most like
ILM would produce.

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Matt Giwer wrote:
> 
>     One of the best I have seen or perhaps the one that looks most like
> ILM would produce.

Thank you VERY much for the compliment, but i'm sure that ILM can do a
better job, dont' they ??????.... :)

And, ILM would have added a shockwave...... well, lets go to work and
make my own shockwave !!!

Bouf.

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In article <387C6D89.2FCEB084@nanterre.marelli.fr>, Bouf 
<Chr### [at] nanterremarellifr> wrote:

> And, ILM would have added a shockwave...... well, lets go to work and
> make my own shockwave !!!

Hmm, the symmetrical and roughly spherical shape suggest it is in null 
gravity and so probably in a vacuum. Vacuums don't show shockwaves...
It is a very good explosion effect, though. Definitely of at least equal 
quality with most movie effects.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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Bouf wrote:

> Matt Giwer wrote:
> >
> >     One of the best I have seen or perhaps the one that looks most like
> > ILM would produce.
>
> Thank you VERY much for the compliment, but i'm sure that ILM can do a
> better job, dont' they ??????.... :)

    Today, ILM adds a ring that comes out that is meaningless and impossible
by physics. At least the old ILM didn't obviously violate physics too badly.


> And, ILM would have added a shockwave...... well, lets go to work and
> make my own shockwave !!!

    That is precisely the issue. A real shock wave is spherical not an
expanding ring. You can see it in a few WWII explosions. And it is really
moisture condensation from the overpressure, like a cloud, so you see it less
in desert explosions. In other words, there are no shockwaves in space any
more than there is sound. But almost all the movies have both. 2001 was
praised for not having sound in space. Star Wars put it back. Babylon 5 did
it right only once in the one episode with the two maintenance workers if I
remember.

    Looking like ILM is not necessarily a compliment to realism but it is
recognition that it is what people expect to see. Quite like machinegun
bullets making puffs in the dirt at the bad guy's feet and the one killing
shot jumping up to hit him. Or bullets causing sparks when they hit. Or a
thousand other hollywoodisms that exist only in movies.

    Duplicating Hollywood and realism are not the same thing. However in
competition you can lose points for not being like Hollywood.

    For your image, it was symetrical and dissipated. It also stayed dense in
the early part of the expansion before chaos would cause the clumping and
filimenting. I don't know what you had in mind or put into the scene but that
is more like the real result.

    The only improvement in realism I can suggest is that it be white for the
first few frames and drop through yellow for most of the rest then quickly
through orange to red at the end. That would follow the temperature decrease
from the expansion of the gasses. Whether or not that would look hollywood is
another question.

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Thanks to those who have take time to give me advices and compliments.

I'm releasing my last attempt (for now) to make this explosion I'm
dreaming since I know POV.

The explosion is a bit less symetrical, and I've added some streaks and
an "ILM-style Shockwave" (actually slightly adapted H.E.Day's
Shockwave). No, it's not more realist (reality is often not very
impressive....:-)

I will clean up the source and make it available for all, before
adding/deleting/rewriting some features in a few
weeks/months/years(?)....

Bouf.

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Attachments:
Download 'expl11.mpg' (100 KB)

I can almost see that anguish on the face of the poor crew of that exploding
spaceship... oops, my imagination went too far. Great explosion! Really!
Please release the source soon. :) I suggest you just release it after
cleaning, and not worry about adding features, until it has been released,
that way you won't delay the release like Rune (hint, hint).

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TonyB wrote:
> 
> I can almost see that anguish on the face of the poor crew of that exploding
> spaceship... oops, my imagination went too far. Great explosion! Really!
> Please release the source soon. :) I suggest you just release it after
> cleaning, and not worry about adding features, until it has been released,
> that way you won't delay the release like Rune (hint, hint).

That's exactly what I intended to do, but it seems my poor knowledge of
english langage betrayed me once again... :(

So look in p.b.s-f in a few days.

Bouf.

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