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Activity Forums Adobe After Effects ripping the comp

  • ripping the comp

    Posted by Brandon on April 20, 2005 at 2:30 am

    Hi,

    I’ve searched for this and tried to rip the center out of the solid to reveal a layer underneath. Think of it like this, ripping a chunk of paper out of the middle to reveal something underneath. Anyone know how to do this? Thanks

    Brandon

    Doug Jacobson replied 21 years ago 4 Members · 7 Replies
  • 7 Replies
  • Mike Clasby

    April 20, 2005 at 4:17 am

    I liked the look of this in a test.

    Overview:
    in Photoshop – Make a “donut” and a “donut-hole”.
    in AE – “Page Turn” the donut hole.

    Details:
    Take you photo into Photoshop.

    Dup the Background layer twice.
    Click off the eyeball for the original background or trash that original layer.

    Label one donut, and the other donut-hole.

    In “Donut” with the lasso tool draw a selection the shape of the patch you want to tear out of the center.
    Delete the selection.

    Now in the Donut-hole layer, Invert the selection (Ctrl Shift I) and delete the outside, leaving the donut hole.

    Save as a psd.

    Import into AE, as a “Composition” and “Document Size” (this helps when we throw the page turn effect onto the donut hole layer).

    Click the Comp to open it.

    On the donut-hole layer, Distort > Page Turn.

    Set keyframes. Go down the timeline then change the Fold Position (I used mostly the x parameter).

    That sucker just rips right out of there.

    Add a little ripping sound (https://www.findsounds.com/) in the right spot and you got it.

    I never thought of doing this, but I knoe I’ll use it somewhere. Thanks.

  • Avrohom Kohn

    April 20, 2005 at 4:49 am

    Here’s an alternative way:

    In AE, make a mask the of the hole you want to rip out, then duplicate the layer and set the bottom layer’s mask to “invert”, then by animating the top layer you’ll have a chunk come out.

    -A.N.

  • Brandon

    April 20, 2005 at 5:26 am

    Thanks for the input. I will try it.

    Brandon

  • Doug Jacobson

    April 20, 2005 at 6:21 am

    So is it possible to have the ‘donut hole’ cast a shadow using 3D layers and a light? I tried this but it seems the page peel is not ‘visible’ in 3D.

    Thanks,
    Doug

  • Mike Clasby

    April 20, 2005 at 7:12 am

    Yea, you’re right. I think all the CC’s are 2D, but…

    Drop Shadow will drop a shadow from the hole onto the donut.
    At first I couldn’t get the curling page to cast a shadow onto itself, but I noodled it out.
    So get the drop shadow from the hole onto the donut, the way you like it. I had to keep the “Distance” at zero until the hole was about half off, then I increased the distance so the shadow appeared. Anyway get the shadow the way you like it, then dup the hole layer, and then change the top hole’s layer from, PageTurn > Render > Full, to PageTurn > Render > Backside.
    And change the lower hole layer from PageTurn > Render > Full, to Page Turn > Render > Frontside.
    So the top hole layer renders the backside of the page turn.
    And the lower hole layer renders the frontside page turn.

    And the backside of the hole (on top) casts a (drop) shadow on the Frontside of the hole. And the Frontside of the hole casts a (Drop) shadow on the donut. Hey, I’m confusing myself.

    Anyway it works.

    But it’s still 2D, it just looks 3D.

  • Mike Clasby

    April 20, 2005 at 7:20 am

    Radial Shadow works to, I think I like it better than Drop Shadow on the top-hole layer.

  • Doug Jacobson

    April 20, 2005 at 2:00 pm

    Thanks!

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