This post contains spoilers For the franchise Starghat.

In Roland Emerich's "Stargate", we see an energy vortex created by the title of the gate as a pressure flood. After its feedback trajectory, a whirlpool form is attached to a small path. Called "Strawell" by Emerich, this vortex effect was unique to this 1994 film, as well as any title of franchise that followed (Especially the 10-season series of SIFS "Stargate SG-1") Delicate for a slightly different visual effect to display the same energy vortex.

If you have seen a "SG-1", you may remember the permanent image of a massive energy burst that rushes through the stargate right before it is ready for an intergalactic journey, taking a high pressure fountain. Samantha Carter (eavesdropping on Amanda) playfully refers to this unstable vortex as Kavosh, as it is formed as soon as the starvet is preparing, rushing through the rings and swallowing something on his way before calming back to his source.

The science behind the formation of this unstable vortex can become a little awkward, but can best understand how a security measure that facilitates a stable journey After falling apart in the pool. Later, we find out that Tokra is carrying out her funeral customs by dissolving the dead in the vortex path, as its high -pressure speed breaks down into everything that touches. As the episodes progress, we are private to how this phenomenon is perceived by various fractions, such as when those captured in a prison planet (wrong) believe that this vortex can be used to travel backwards through the Starghat device. Other versions of this unstable vortex are seen in the Or-made supergate, which creates an even larger, more intense whirlwind because of the huge amount of energy it uses to move forward.

But how was this effect of Kavosh without the use of CGI? As you can already assume, the process was more complicated than it seems, as confirmed by "Making Stargat", A 1994 documentary, which explains how this practical visual effect was first created in Emerich's Stargat.

The 1994 documentary refers to the effect of Kavosh, explaining how it was created by suspending the air cannons over a centimeter above the surface of the water. An air cannon can be used to generate compressed air, and in this case, this compressed air was used to move the water forward at stronger speed. This can sound Simply, but not, as many variables should be taken into account as such an important aspect of the Starghat activation process.

Since Emerich's film shows only the unstable vortex once (and follows it with Strawell), the process was one and done, which was not the case with "SG-1" because of its episodic format. The SG-1 crew often uses the device, so it makes sense for the show's visual effects team to find out a way to replicate this convolutable method several times.

After GateVFX Johnon Gidecki's "SG-1" and his team have suffered countless rounds of rehearsal and mistake to recreate footage of the small screen film:

"We set up air cannons above, (but) we didn't know how much air pressure to use. We set up the camera up, we set the lights up. We recorded a few tests, then put the pressure of 50kg. So we rolled the camera at 120 frames per second.

After testing different strategies, the crew understood the optimal air pressure and angles that would help catch the best, recreate the effect in a massive water tank. Since this version of the unstable vortex did not come with a stream, it was simply touched with the elements of CG to evoke the image of a puddle.

Although the company and the company could have used the CG to create the effect in the first place, the SG-1 team was always eager to take challenging ideas and perform them with practical effects thrown in good measure. Another example of their dedicated art is the decision to shoot Arctic scenes in Stargate: Continuum on the site, which has Earn the franchise still unnoticed the place of the Guinness Book of World Records.