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Using laser projectors, a movie image
would be
projected on a cloud hundreds, even thousands of feet
overhead and
would
morph and change as necessary to provide a flat image
on a lumpy, undulating cloud from
a particular angle, say where a large city is.
The shape tracking would be done
by checking the
relationship of various bits of the picture and adjusting
for if they drift apart or come together too much.
You could tell folks where to go in the interwebnet to
hear
the soundtrack.
To be clear, things have been projected on clouds since
Batman first did his bat thing, but this is to adjust the
image being projected onto the morphing, uneven
projection screen of a
cloud so that it looks flat.
Good thinking, Batman.
https://en.wikipedi...ignal_1989_film.jpg
It's a start... [whatrock, Dec 10 2021]
(?) Rafael Lozano-Hemmer projection mapping
https://m.youtube.com/watch?v=pKrVkW8Psp0
second sun [xenzag, Dec 11 2021]
Wow!
https://www.youtube...watch?v=jtFthRSqRwQ
Check this out. [doctorremulac3, Dec 12 2021]
So this is what I was picturing but with clouds with the uneven surface adjustment thing.
https://www.youtube...watch?v=a1v4W95wJnM
[doctorremulac3, Dec 12 2021]
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Tell me honestly, does this projection make my cloud look flat to you? |
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0) Screw the FAA, this is art. |
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1) You’d need more than one color for sure. |
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2) I think you could make a test computer mock-up
fairly easily with basic off the shelf 3D modeling
programs. Take a 3D cloud model and put a bitmap
(I think they call it) overlay and see how much you
need to adjust it. Start with a simple ball that
would distort the picture so it looked like a fisheye
lens, counter the distortion then apply the same
process with the more complex shapes of a cloud. |
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// Screw the FAA, this is art.// |
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OK, once this is working, use it to show the Howard Hughes
movie "Hell's Angels", in which a background of clouds was used
to give more reality to scenes of aircraft in flight. |
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Image distortion: Seems to me, that if the observer is
close to the laser projector, no correction is needed. The
light comes straight back. For psyops, of course the
projector needs to be somewhere remote from the
observer. In that case, in order to have an undistorted
image, the cloud can't have a surface so contorted that
there are surfaces the observer can see that are not visible
to the projector. So that will depend on how far away the
projector is. |
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Also, the image will only be "perfect" from one observation
point, but even there the image will be somewhat fuzzy
depending on the density of the edge of the cloud. |
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You may want to look at the work of artist Rafael
Lozano-Hemmer who uses projection mapping,
along with a variety of other interactive processes
in his work. For example; the creation of a second
sun floating in the sky over a city. [see link] |
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Ooh, I like that, [xenzag]. |
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I wonder where he was projecting the images from; I noticed a
dark spot at the top of the "sun": maybe there was some
equipment under that. |
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If you do some searches, there are full details of
how Lozano-Hemmer makes his work. He's not a
magician. He's an artist with a large team of
technicians and engineers who help him to realise
his ideas. |
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As per [scad mientist], there will be a parallax error for
anywhere except the "set" viewpoint. Of course, the further
away the cloud, the smaller the error; so aim for cirrus (as [2
fries shy of a happy meal] said...).
Maybe multiple linked projectors, to "fill in" gaps? |
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