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Motion blur
I’m debating whether I should render motion blur (mostly camera swish panning) out of my 3D app, or out of after effects when compositing. Maya’s mental ray renderer offers a host of solid motion blurring parameters, each more time consuming then the next. But I can get accuracy by punching in the right settings.
My question is this: Is motion blurring in AE done entirely by eyeballing it? A camera pan, for example, accelerates and decelerates. Does AE (which I clearly have much to learn about) consider this, or must I keyframe it all myself?
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5 Replies
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motion blur in ae works quite well and looks quite natural. however, it works on layers that have parameters that have keyframed changes (like key framing a postion, or rotation change).
standard motion blur won’t work on endered or recorded footage. for that you would need to try effects like frame blending, echo, etc to composite other frames to try and mimic motion blur, and you’ll probably ned to help it a bit with a directional blur too.
however, re:vision has a very good effect called reel smart motion blur (rsmb) that can generate a very realist motion blur from rendered footage, and may give you good results at a fraction of the render time that 3d motino blur may take, if you want to spend some money. you might try downloading the demo and see how it works for you. i like it, especially for adding motion blur to 3d renders.
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
Thanks for the reply. Brought my atention to issues I didn’t even know existed. Will look into Re:vision. I used their fieldskit once and was quite impressed.
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Unless they’ve changed it, Reelsmart Motion Blur can sometimes distort objects that aren’t moving directly across the frame.
So if your 3D object is moving towards or away from the camera, you may wish to render the blur in your 3D app.
Hey, do a test. 🙂
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[Steve Roberts] “Reelsmart Motion Blur can sometimes distort objects that aren’t moving directly across the frame. “
Well, that’s the problem with optical flow techniques.
We suggest that you separate objects that are moving in different directions (where a stationary background is considered an object) and motion blur each layer separately from the object(s) behind them (and so on). Many times that’s not possible (in the case of articulated figures, for example)… but many times it is not only possible, but the multiple passes can still be faster to perform with RSMB.
Your mileage may vary, of course 🙂
Pete Litwinowicz
https://www.revisionfx.com -
This should be simple and workable. All I have are animated cameras and the odd door swinging open. These were going to be rendered in passes anyway.
Many thanks.
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