Making a Pulsing Background


To create the foundation for this project's animated background, you'll start with the Sonic Loop composition, which also serves as the pulsing letter O in the finished movie:

1.

Create a new composition named Radar_background, using the NTSC D1 Square Pix, 720x540 preset, with Duration 15;00 seconds.

2.

Drag the Sonic Loop composition to the Radar_background Timeline at time 0;00, and change the layer's Scale to 200.0, 200.0.

3.

Duplicate the layer four times so you have five layers total.

4.

Go to time 0;10, select all the layers, and press P. Set the layers' X Position values to 0, 180, 360, 540, 720, to distribute the layers evenly across the entire width of the composition.

Distributing the layers along the X axis

The Sonic Loop layers in formation

5.

Stagger the layers' In points by five frames from time 0;00 to time 0;20 so they first appear at different times. For example, we set the In Point of layer 1 to 0, of layer 2 to 0;10, of layer 3 to 0;05, of layer 4 to 0;20, and of layer 5 to 15.

6.

Select all the layers, and pre-comp (Layer > Pre-Compose) them. Name the composition radar_5across.

7.

Duplicate the radar_5across layer four times for a total of five layers.

8.

Select all the layers, and press P. Set the layers' Y Position values to 0, 135, 270, 405, 540, to distribute the layers evenly across the entire height of the composition.

9.

Stagger the layers' In points by five frames from time 0;00 to time 0;20 so they first appear at different times. For example, we set the In Point of layer 1 to 0, of layer 2 to 0;10, of layer 3 to 0;05, of layer 4 to 0;20, and of layer 5 to 15.

If you preview the animation, you should see pulsing circles appear at different points in time. They fill the entire composition and continue pulsing in and out.

10.

Close the Radar_background composition, and open the Sonic Promo composition.

11.

Drag the Radar_background composition to the Timeline at time 0;00, and set the layer's Opacity to 25%.



    Adobe After Effects 6.5 Magic
    Adobe After Effects 6.5 Magic
    ISBN: 0321267230
    EAN: 2147483647
    Year: 2005
    Pages: 236

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