Adobe After Effects 5.0- P9

Adobe After Effects 5.0- P9: AdobeAfter Effects5.0 provides the core 2D and 3D tools for compositing, animation,and effects that motion-graphics professionals, Web designers, and video professionalsneed. After Effects is widely used for digital post-production of film, motion graphics,video multimedia, and the Web.
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Adobe After Effects 5.0- P9 ADOBE AFTER EFFECTS 5.0 239 Classroom in a BookCreating a new compositionBefore you begin building the final 2D composite, you need to create a composite of thethree circle elements. You’ll combine these elements in one composition so that you cantreat it as a single layer in the final composite.1 Choose Composition > New Composition.2 In the Composition Settings dialog box, type Ring Mix Comp in Composition Name.3 Enter the following options:• In Width, type 800.• Deselect the Lock Aspect Ratio option.• In Height, type 800.• In Pixel Aspect Ratio, select Square Pixels.• In Frame Rate, type 29.97.• In Duration, type 500, to specify five seconds.• (Optional) In Resolution, select Half or lower, as needed for your system.4 Make sure that you have entered all these options correctly, and then click OK.240 LESSON 7 Combining 2D Elements in a Composite Combining the circles layers and applying transfer modes Next you’ll add the three circle elements to the composition and apply transfer modes to blend the layers. 1 If the background color of the composition is not set to black, choose Composition > Background Color, and select black. 2 Make sure that the current-time marker is at 0:00. 3 In the mov files folder in the Project window, select the Rings.mov, the LineCircles.mov, and the DotCircles.mov and drag them directly to the Timeline window to automatically center them in the Composition window. Note: To select all three files and drag them together, hold down Ctrl (Windows) or Command (Mac OS) as you click. In the Timeline window, the file layers will stack in the order in which you select them, with the file you click first as Layer 1, and so on. 4 If necessary, select the files in the layer stack and drag them so that they are in the following order: • Layer 1: LineCircles.mov • Layer 2: Rings.mov • Layer 3: DotCircles.mov 5 Move the current-time marker to 3:00 so that you can see more images in the Compo- sition window. 6 In the Timeline window, click the Switches/Modes bar to open the Modes panel (if it is not already open). Or, choose Panels > Modes from the Timeline window menu. ADOBE AFTER EFFECTS 5.0 241 Classroom in a Book7 In the Mode pop-up menus for Layer 1 and Layer 2, select Screen. Leave Layer 3 inNormal transfer mode.Note: You can also select a layer and choose Layer > Transfer Mode > Screen to set thetransfer mode.The Screen transfer mode creates a blended appearance among the three layers, visuallyuniting them.Animating the rings opacityIn this procedure, you’ll set a simple dissolve-in for one of the layers.1 In the Timeline window, select the DotCircles.mov (Layer 3) and press T to open itsOpacity property.2 With the current-time marker at 0:00, type or scrub 0% for the Opacity value and thenclick the stopwatch to set a keyframe.3 Move the current-time marker to 1:00, and scrub or type 100% for the Opacity valueto create a second keyframe.4 Press T to hide the Opacity property.5 Preview the animation and then save the project.The DotCircles.mov layer now dissolves-in during the first second of the composition.242 LESSON 7 Combining 2D Elements in a Composite Setting opacity to create randomly flashing layers Next, you’ll experiment with the opacity of the other two layers. Rather than entering specific values, you’ll randomly change Opacity values and add keyframes so that the layers appear to flash in and out of view at irregular intervals. Exactly when and how large those changes are is up to you. 1 In the Timeline window, select Rings.mov (Layer 2) and press T to reveal its Opacity property. 2 Move the current-time marker to 0:00, and then click the stopwatch for Layer 2 to set a keyframe at 100% opacity. 3 Move the current-time marker forward approximately 10 to 30 frames (the exact position is not important) and press Alt + Shift + T (Windows) or Option + T (Mac OS) to set a keyframe. Or, you can set the keyframe by clicking the keyframe check box in the A/V Features panel. 4 Continue to set Layer 2 Opacity keyframes about every 10-30 frames ...