Today I went down the rabbit hole of Is It Possible To Recreate The Stargate
Kawoosh theoretically as a practical effect? What I thought of first was take a
periscope, remove the top part with the top mirror/prism and fill it with water.
The viewer would now see water ripples on a vertical surface. Put a Stargate
prop around the viewer and you're good to go. But obviously this will be too
deep in and not be as close to the surface of the Stargate as it should be. Then
I started thinking about the almost holographic effect of parabolic mirrors
-that put my brain in an infinite fractal loop :-S

Anyone have any ideas? :)

-Nekar Xenos-

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"Nekar Xenos" <nomail@nomail> wrote:
> Today I went down the rabbit hole of Is It Possible To Recreate The Stargate
> Kawoosh theoretically as a practical effect? What I thought of first was take a
> periscope, remove the top part with the top mirror/prism and fill it with water.
> The viewer would now see water ripples on a vertical surface. Put a Stargate
> prop around the viewer and you're good to go. But obviously this will be too
> deep in and not be as close to the surface of the Stargate as it should be. Then
> I started thinking about the almost holographic effect of parabolic mirrors
> -that put my brain in an infinite fractal loop :-S
>
> Anyone have any ideas? :)
>
> -Nekar Xenos-

Hi Nekar,
Welcome back to the forums!  :)

like this? :
https://www.youtube.com/watch?v=Mi_xG8XovrE

I'm assuming that it's the big bubble effect of the unstable vortex that you're
trying to do?

Perhaps an isosurface with bubble paths mapped out in randomized sine-wave
spline paths?  That way the bubbles get subtracted from the liquid isosurface,
and whoosh outwards until a max at pi/2 and return to the glyph ring at pi?
Randomizing the path radially would give a fill-in over the whole surface of the
"water".

Of course you could do it with spheres and CSG as well.

We recently partially reworked a bubbles macro, and I did a physically correct
falling raindrop that you could use for bubble shapes as well.

I'd say that you'd want that extended "blooping" of a forcibly extruded air
bubble in water, though.

Maybe model that like the gravitational breakup of a falling stream of water.


- BE

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https://www.gateworld.net/news/2020/07/stargate-vfx-supervisor-creating-kawoosh-effect-sg1-early-days/

KAWOOSH!

amazing kawoosh effect on a TV budget and schedule. That iconic shot of the
Stargate connecting a wormhole to a distant world has to look right.


ordered a special [tank] for the show, and it was one meter by one meter by one




tests, then we set the pressure at 50 pounds. So, we roll the camera at 120
frames per second, the water is as flat as we can make it, you push the button
and it lets the air go down the tube right into the water. Well, as it turns
out, [the movie] used about 5 pounds, or 10 pounds. So 50 pounds just emptied
the tank everywhere!





https://www.youtube.com/watch?v=x1ODClVbjsw

https://www.youtube.com/watch?v=usHi9c3e_rY
"After years of on and off tweaking, I finalized the Kawoosh animation. It's all
done in LightWave 2018 using a complex nodal displacement setup, with some post
processing in After Effects.


Animation Test (2014)  ) I did years ago. The secret lies in tweaking the
displacement until it looks and animates like a water surface. The rest is
created by reflections of a proper background image, and a luminous surface
behind the event horizon."


Blender tutorial:

https://www.youtube.com/watch?v=zXr3IFsYWiI

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"Bald Eagle" <cre### [at] netscapenet> wrote:

> Of course you could do it with spheres and CSG as well.
.....
> I'd say that you'd want that extended "blooping" of a forcibly extruded air
> bubble in water, though.

I'm at work, and my brain is slow ---

this would probably best be done using BLOBS, since that would give you
excellent bounding plus some of that "blooping" effect with spheres that were
semi-detached from the main mass.

Alternatively, you might consider using a cone or capped cylinder isosurface for
the bubbles and perturb the surface with a fractal noise function.

- BE

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"Bald Eagle" <cre### [at] netscapenet> wrote:
>
https://www.gateworld.net/news/2020/07/stargate-vfx-supervisor-creating-kawoosh-effect-sg1-early-days/
>
> KAWOOSH!
>
> amazing kawoosh effect on a TV budget and schedule. That iconic shot of the
> Stargate connecting a wormhole to a distant world has to look right.
>
>
> ordered a special [tank] for the show, and it was one meter by one meter by one
>
>
>
>
> tests, then we set the pressure at 50 pounds. So, we roll the camera at 120
> frames per second, the water is as flat as we can make it, you push the button
> and it lets the air go down the tube right into the water. Well, as it turns
> out, [the movie] used about 5 pounds, or 10 pounds. So 50 pounds just emptied
> the tank everywhere!
>

It's nice to see you guys again!

The reason I posted this in off-topic was a thought experiment on what would be
the easiest way to use the above method to make it for a man-cave? Instead of
the periscope which is too small, put a 45 degree mirror behind your stargate
model and a clear plastic tub of water above it. Then use a compressor to blow
air in.

The only issue is that the kawoosh splash won't go out into the room like in the
series, and the ripples will be way behind the stargate. Which is why I started
thinking of parabolic mirrors.

-Nekar Xenos-

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"Nekar Xenos" <nomail@nomail> wrote:

> The reason I posted this in off-topic was a thought experiment on what would be
> the easiest way to use the above method to make it for a man-cave? Instead of
> the periscope which is too small, put a 45 degree mirror behind your stargate
> model and a clear plastic tub of water above it. Then use a compressor to blow
> air in.

OOOOoooooh.
Constructing one IRL!

Maybe you could make it small and magnify it, and then just use a pellet gun or
a paintball marker for your air cannon.

Perhaps even shoot the air through a small hole in a mirror to hide the
mechanism.

You could even use a webcam or something so that you could composite the
stargate ring and the kawoosh somehow.

- BE

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"Bald Eagle" <cre### [at] netscapenet> wrote:
> "Nekar Xenos" <nomail@nomail> wrote:
>
> > The reason I posted this in off-topic was a thought experiment on what would be
> > the easiest way to use the above method to make it for a man-cave? Instead of
> > the periscope which is too small, put a 45 degree mirror behind your stargate
> > model and a clear plastic tub of water above it. Then use a compressor to blow
> > air in.
>
> OOOOoooooh.
> Constructing one IRL!
>
> Maybe you could make it small and magnify it, and then just use a pellet gun or
> a paintball marker for your air cannon.
>
> Perhaps even shoot the air through a small hole in a mirror to hide the
> mechanism.
>
> You could even use a webcam or something so that you could composite the
> stargate ring and the kawoosh somehow.
>
> - BE

 Yes, a magnifying mirror might work and maybe even help to bring the image more
foreward. Maybe I should try recreating it in Pov-Ray with photons.

-Nekar Xenos-

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