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• Could the Graph Editor solve the shakey rotation.

# Could the Graph Editor solve the shakey rotation.

Participant ,
Sep 17, 2022 Sep 17, 2022

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I have rectangular strips rotating, they are in pairs very close, just .5 pixel apart but I get to see both colours when rotating.

I will try making them 1px apart and see if it helps.

Could graph editor help to speed up through the shakes as rotating?

Can you have different colour on each side of a rectangle in 3d mode?

I guess I could just use curves to make changes in colour as the rotation occurs.

Thanks for any suggestions.

Myfanwy E S McLean
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Participant ,
Sep 17, 2022 Sep 17, 2022

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https://youtu.be/AGG4kjQ8GDU

Myfanwy E S McLean

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LEGEND ,
Sep 17, 2022 Sep 17, 2022

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The graph ediotor can't fix anything here. It's simply inherent in how the motion is produced, how slow it is and how the 3D sampling works. You'll always have some jitter. Given that these are just simple strips I probably wouldn't bother with 3D at all. The illusion of rotation could be just as well created with scaling the individual clips in a sinusoidal manner or for that matter doing so with a Venetian Blinds effect applied to a bunch of pre-compositions with the strips arranged neatly. It's all just an illusion.

Mylenium

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Participant ,
Sep 17, 2022 Sep 17, 2022

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Your suggestions sound very sensible and will take a look at both.

Thanks.

Myfanwy E S McLean

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Community Expert ,
Sep 17, 2022 Sep 17, 2022

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Judder like that is caused by the stroboscopic effect of frame rate and movement. When you see stagecoach wheels moving backward in movies, it's the same thing. To prevent judder, you need to have the movement be a whole number of pixels per frame and the frame rate to be an even multiple of the refresh rate of the display. That's hard to do with 3D rotation. The easiest fix is to make the move a little faster and add some motion blur. The human eye has a shutter speed of about 12 to 15 frames per second but a frame rate of somewhere between 30 and 60 fps. That is why animated cartoons like Buggs Bunny only had 12 animation cells per second instead of the 24 that is the industry standard (25 in countries with 50 Hz power - PAL). They just photographed each cell twice.

Because your video has no motion blur, the movement is not consistently an even number of pixels per second, and our eyes have a high frame rate, and the refresh rate of your monitor is high, the edges are going to behave badly. Try adding Motion Blur and open the comp settings and change the shutter angle from the default 180º to 270º or even 360º. That should help.

I would also make the movement a lot faster. There's not much going on in the scene, and our attention span is not very long.

There is one more potential problem. 3D layers have no depth, so when they are perpendicular to the camera, they completely disappear. This creates the disappearing wave that moves across the screen. You can fix that by using the Venetial Blinds effect, or you can change to the C4D rendering engine and give your layers a thickness of one or more pixels.

I hope some of this babbling helps.

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Participant ,
Sep 17, 2022 Sep 17, 2022

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Thanks I think that is all helpful.  I will trial and error through.  Venetial Blinds sounds easy and this is about the efficient design process in the end.  No worries about doing things quicker if result is just as good.

Myf.

Myfanwy E S McLean