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beam effect is shaky
I created a beam using the beam effect and made a pre-comp with it. In a new comp, I am wiping it across the full diagonal of the screen multiple times. A typical duration of a single wipe is 1:00. It looks jittery. The comp has 29.97 frames per second (I have some NTSC video in it). I am viewing it at 100% resolution.
What should I do so that it looks smooth? I think I tried motion blending and it looked worse–it lost some of its color; I don’t understand why.
Thanks.
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4 Replies
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you could try to generate your motion blur.
i’ll assume your beam is on a solid and not set to composite on original… take your beam comp into a new comp and apply the echo effect. try setting the echo time to -0.003, number of echos to 30 (maybe more) and decay to 0.9. you’ll need to try a few echo operators for the effect you are looking for, but maximum usually looks most natural, but screen or add may make it more glowing…
you may need to further refine the echo time value if the instances of the beam are not closely spaced. also, number of echoes and decay will determine the length of the motion trail.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Hi Kevin.
The beam is on a solid in the precomp; composite on original is set to off. In the main comp, I added the echo filter to the layer w/ the precomp in it and set it to the settings you suggested. When I set the operator to natural, it didn’t seem to make a difference; screen and add turned it into a solid white line. My guess is that did something with the alpha channel (perhaps that tells you something about how I constructed it that may be relevant).
Would AE be creating two fields for each frame, i.e., interlace it? The way the beam appears as it wipes across the screen reminds me of weird things that sometime have to do with interlace problems.
Thanks.
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this should work (or at least you should get some result, if you have what i think you have)…
you have a solid layer with the beam effect and one end of the beam moves across the screen over one second. choose layer>pre-compose to precomp that layer (choose move all attributes, don’t open comp).
now apply the echo effect with similar settings to what i described earlier. you should start to see instances of the beam getting composited with the current beam frame, which resembles motion blur.
as far as interlacing, ae can interlace the render if it is set to tint he render settings, but it will not interlace the previews…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
It is constructed somewhat differently:
• I have a comp with a beam. The the position of the beam is unaltered. I made it into a precomp.
• In the main comp, I swipe the entire beam (precomp) across the frame and it appears shaky as it goes across.Does this change what you recommend?
Thanks.
Victoria
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