Lou,

This sounds like it might not be something you want to track in Mocha. I'd look at using the normal After Effects camera tracker that got bundled in last version. You'll be able to grab a null from that will be in the right 3D space with a camera that's pretty close to right. Mocha is great but this sounds like something where you want have a better idea about the volume of the space and not just one tracked point. 

Brian 

Brian Behm

Rooster Teeth Productions

Austin, TX

On Wed, Sep 4, 2013 at 1:10 PM, Lou Wirth <loutv@mindspring.com> wrote:

Okay Thanks.   Now a Mocha question.  As I stated below, trying to motion track a city aerial and apply to null, parent text to null.  Its kind of ok but not great.  The text is not really locked into the landscape.  Kind of drifting.  Do I sample a smaller area when tracking?  or should I apple stabilizer to the aerial first?

Lou
Lou Wirth Productions
500Tamal Plaza, Suite 522
Corte Madera, CA 94925
www.louwirth.com
415-924-9411p





On Sep 4, 2013, at 10:41 AM, Jim Curtis <jpcurtis@me.com> wrote:

> IIRC, the only layers that Element recognizes as Group Sources are text or masks, not precomps.
>
>
> On Sep 4, 2013, at 12:23 PM, Lou Wirth <loutv@mindspring.com> wrote:
>
>> I have a solid color box 400x700 with a titles on it, precomposed the two layers.  Put in new comp and added a solid to apply Element.  I want to be able to extrude this box and position over a city aerial, motion track the aerial and apply to the box.  So this massive monolith title over its color bg is sitting in the city among the buildings.  Problem is I can't figure out how to get the title and color on my extruded Element object  I set custom layer to my pre comp title and particle replicator as my layer.  But no go.  Just get the blank model in Element.  Any suggestions?
>>
>> thanks
>>
>> Lou
>> 500Tamal Plaza, Suite 522
>> Corte Madera, CA 94925
>> www.louwirth.com
>> 415-924-9411p
>>
>>
>>
>>
>>
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