tailieunhanh - Adobe After Effects 5.0- P12

Adobe After Effects P12: Adobe After Effects provides the core 2D and 3D tools for compositing, animation, and effects that motion-graphics professionals, Web designers, and video professionals need. After Effects is widely used for digital post-production of film, motion graphics, video multimedia, and the Web. | ADOBE AFTER EFFECTS I 337 Classroom in a Book 2 In the Tools palette select the oval mask tool and draw a mask around the reflective ball in the Layer window. You can press Ctrl Shift Windows or Command Shift Mac OS as you draw to drag a circle shape from its center. In the Composition window the Blue Solid fills the area outside of the mask. 3 Press M to reveal the Mask Shape property for the layer and click the stopwatch to set a keyframe at 11 28 . 4 In the Modes panel for Mask 1 select Subtract from the mask mode pop-up menu. Your mask now reveals the blue solid within the glowing ball. Leave the Layer window open with the layer displayed. Rather than displaying only the area inside of the mask shape as with Add Subtract removes what is inside the mask shape from the original image and displays the remaining image area. Rotoscoping the reflection on the glowing ball Rotoscoping refers to painting or altering an image frame-by-frame. This procedure follows in that tradition of hand-crafted image-creation. In this task you advance a few frames at a time setting keyframes for Mask Shape in the Timeline window and then adjusting the mask in the Layer window so that it continues to match the shape of the glowing ball as the frames advance. This meticulous work creates exactly the visual interactions that you want. Currently you have just one keyframe for the Mask Shape property created in the previous procedure. Now you add more keyframes. 1 In the Timeline window with the current-time marker at 11 28 select Mask 1 under the layer. 338 LESSON 10 Building the Final Animation 2 Make sure that Mask 1 is selected in the target menu in the Layer window. 3 Press Ctrl A Windows or Command A Mac OS to select all the mask points and then press Ctrl T Windows or Command T Mac OS to display the transform handles for the Mask Shape. Adjust these handles in the Layer window to reshape the mask so that it matches