Wait a second... I found the answer... Eureka !!!
Do you remamber thew movie Jaws, the scene when Roy Scheider character get a kind of vertigo/scared/surprised, when he is sit on the beach and found there is a shark atacking people ?
https://youtu.be/rW23RsUTb2Y?t=119
It's the same effect used a lot in the movie The Quick and the Dead (1995) during the duel scenes .
It's made with camera moving out and soon lenses trying to keep the characters n the same size on frame. This combination of moving the camera out (away) combined with soon lenses tring to move in, gives a nice effect. It can also be like camera moving on (closer) and soon lenses moving out, like did in Jaws.
I believe this was a "reaction" on a water thank, a ver large and deep one, shoot in high camera speed, with the camera shooting moving the film in oposite direction to project like a reversed start/end) and using the same effect of Jaws. The camera move away and the soon lenses try to keep the same size for the bright center of the "star hole" . This would explain why the "moving stars" moves so straight, so perfect. That's why they moved to a olf factory to shot the particular effect, cause only nthis one would require a very large thank able to hold the came and depth perspectives in order to generate the ilusion of moving stars coming from a hole.
It could never be made in a small glass plate or a small thing, since it require dimension, depth, in scale for a camera capture it . Maybe it wasn't even a reaction, but just reflective particles in a thank, shining, or just fluorescent particles. The color and contrast could be altered on lab later.
But a question rises : How would the camera move inside a water thank without disrupt or disturb the water and disturb the direction of particles ("stars"), spoilling the "moving star effects" since it would generate turbulense on water and affet the "star points" ???
I imagine they put a glass barrier inside the water tank, to separate the camera from the chemical reaction.
Grotrian it's fine to me
:-)
Last edited by Beto-Music (20-03-2018 16:18)