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Motion blur on stroked masks

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Dave BaumMotion blur on stroked masks
by on Mar 29, 2010 at 4:48:35 pm

Hi all,

I'm on a job that requires animating a series of Arabic letterforms.

3d stroke almost does the job, but not quite, I can't replicate the shapes well enough with it.

I've decided to redraw everything in Illustrator, and am using an idea from the Meyer's book, which is to draw a path along the centre line of each shape, stroke it with a line thick enough to cover the vector shape, set it to "reveal original image" and then animate the sart and end points. This method works great for allowing accurate shape reveals, but it's so rough! I can;t add motion blur, it does nothing, the option to motion blur the mask is not available and CC force motion blur doesn't work either.

Would I be better of using my paths as a motion path for a second mask, and adding motion blur to that?

Thanks in advance for any help, I've a few of these to do!

cheers,
Dave


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Dave LaRondeRe: Motion blur on stroked masks
by on Mar 29, 2010 at 5:01:01 pm

You know, if you animate the position of a track matte, you can give it motion blur. Would that help any?

You can also animate the feather of a mask as you animate the mask shape itself, giving the illusion of motion blur. A mask can also be used on a solid which you've designated as a track matte.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Dave BaumRe: Motion blur on stroked masks
by on Mar 29, 2010 at 5:09:40 pm

Hi Dave,

Thanks for the info. If you have time to explain any more about track mattes I'd be mighty grateful, I've never used them. If it sounds as thought they would help, I'm all up for trying them out!

As for masks, I understand all of what you say. However, in this instance, the mask is really just a single path line (as opposed to a completed shape) and is used for the stroke only. As the strokestart and end points animate, the shape below is revealed.

The only feathering I can get into it is the hardness of the brush, but if I go less than 100% it becomes too narrow (even at full thickness of 50) to cover the vector I want it to reveal.

I hope this makes sense, as I appreciate the advice!

Thanks
Dave



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Dave LaRondeRe: Motion blur on stroked masks
by on Mar 29, 2010 at 5:13:24 pm

I refer you to AE's online help. Just type the term track matte in search box the upper right hand corner. Very handy.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Dave BaumRe: Motion blur on stroked masks
by on Mar 29, 2010 at 5:19:18 pm

coolio, will give it a whirl.
Thanks


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