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elastic twist effect – time displacement, but better… how?
hey guys,
does anyone know if this is possible with afx?
https://www.cocoe.com/works/twist/index.htmlthey call it the elastic twist effect, i’ve seen other (better) examples in commercials but this was the only example online i could find.
it wouldn’t have to be a twist or spin, just some way of time displacing the footage with motion blur.
ordinary time displacement in afx is pretty dodgy, and comes out with mega-artifacts and jaggy edges. i assume the examples i’ve seen on tv (the high quality ones) are a completely 2d effect though?maybe this isn’t the best example… it actually does look quite jaggy now that i look closer.
how could one get a much higher quality of time displacement? is it a matter of shooting at an extremely high frame rate so that difference between pixels is not so extreme, then time-remapping after the time displacment? -
9 Replies
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For starters, that person is actually twisting in her chair in real life. I think that if you created a gradient from black to white from the top of the screen down, at the time that the twist is playing back, you could displace time, and it would look twisted because different parts of the twist are playing.
I tested this.Made a solid and rotated it in 3D space.
Precomped the rotating layer
Created a solid and Made a gradient using the ramp effect – from white down to black.
Precomped that
with the 2 pre-comps nested in the same comp, add time displacement to the rotating solid precomp.
Bump the time resoultion up a lot – I set mine up to 240 this morning running a test on this, and it cleans it up a lot – but of course it takes a long time to render.
Viola.
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Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com—————————————-
Click the link below to subscribe to the Creative Cow After Effects Podcast, and get free AE video tutorials:https://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=111087911
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mmmmmmmm. I tried what Aharon said but got nothing happening! How does the gradient layer affect the time displacement?
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Sorry, GOT IT. Might make use of this.
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yes i realise the person is twisting in her chair – i wasn’t asking how to make someone move or rotate! what i’m trying to figure out is how to get a higher quality of time displacement out of after effects. i’ll be experimenting later today with some high-res and super-slow footage, which i can then time-remap back to normal speed after performing the time-displacement in a precomp.
i’ll try increasing the time resolution as well. i watched your displacement tutorial yesterday just for the heck of it, and maybe my memory isn’t what it used to be, but did you say that the time resolution setting affects playback speed at all? ie, if you have 25fps comp but you ignore adobe recommendations and bump the time res up to 100, does this make the effect go 4 times faster? something for me to try…
thanks,
scott. -
Forgot – set the time displacement map to be the gradient precomp.
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Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com—————————————-
Click the link below to subscribe to the Creative Cow After Effects Podcast, and get free AE video tutorials:https://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=111087911
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Time resolution effects render/preview speed. More pixels are being replaced so it takes longer. In this case, it’s necessary.
Here’s a sample file to see what I did:
https://www.allbetsareoff.com/temp/twist.zip
—————————————-
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com—————————————-
Click the link below to subscribe to the Creative Cow After Effects Podcast, and get free AE video tutorials:https://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=111087911
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ah i see – it turns out i don’t need super slo mo footage or extremely high res after all. thanks aharon!
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acutally, i think i’ll still need to go with the super-slow mo footage.
it appears as if, in aharon’s example file, after effects is interpolating sub-frame, because we’re time-displacing a comp and not a pre-rendered sequence.
when i try to time displace a sequence or quicktime, i get massive jaggy edges no matter what i change settings to.
for example, i have a chromakey shot of two people walking left to right. when their arms and legs move horizontally across frame, there’s jaggies everywhere (less so on things like heads and waists which move slower and more constantly).even on the super-slo mo (750fps) footage i have, i’m still getting jaggies.
i wonder if there’s a plugin that will do this based on pixel motion as well as time? if only there was some way to control the timewarp effect with gradients!
pete’s plugins (free ones) for time slice aren’t much better, and are difficult to control as well.
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hello Mr Aharon Rabinowitz,i am also trying to achieve a similar effect,but there are horible lines appearing throughout the entire sequence moving don the screen,i ahve tried for the life of me to get rid of them,a bit of help would be greatly appreciated,
yours hopefully
hedd ehed
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