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Forums Adobe After Effects Expressions attach a 2D tracked null to a 3D null to get parallax effect for titles

  • attach a 2D tracked null to a 3D null to get parallax effect for titles

  • Roei Tzoref

    July 18, 2017 at 9:16 am

    Hi. I know I can 3D track a scene and get a camera out of 2D coordinates using Ae (or syntheyes), but I already
    tracked my title to my video using point tracking position+scale+rotation so I have a null with this data to which
    I have attached my title. now I want to experiment with some parallax between the title and the video…

    I know I can toggle the 3D switch for my 2D tracked null and add Z, but then I need to compensate by offsetting position and scale keyframes.
    so I am looking for a better way by attaching the 2D track to a 3D null (after setting the 2D track null and the title layer to 3D) but
    simply parenting the 2D null to the 3D null and shifting the 3D null Z space and reducing scale won’t do. there is no parallax. I am looking for maybe an expression that can extract 3D data out of 2D data so my parallax can work.

    so far I see that creating an expression value+parameter in the 2d track to the 3D null parameter does this. but is there a more elegant way?

    Thanks

    Roei Tzoref
    After Effects Artist & Instructor
    ♫ Ae Blues Tutorials

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