Adobe 12040118 - After Effects Standard Tutorial page 464

elements appear, either in front of, or behind the screen. Any areas that are aligned (left and right views, for example) show the object in precisely
the same spot on the screen. Anything in front of those areas in z space will protrude from the screen. Anything behind those areas will be visible
behind the screen when looking at the scene though stereo glasses.
You can also use Convergence Offset (Scene Convergence) to realign uncalibrated camera views of rendered material, such as, photos or images
rendered from 3D programs. These are generally misaligned and require a negative Convergence Offset value. If the original footage was shot with
correct convergence, changing this value isn't necessary. Keyframing this value may result in erratic animation.
Note: There is improved (truer) handling of edge pixels when using Scene Convergence in After Effects CS5.5 and later. Previously, edge pixels
were duplicated to fill to the edge, but that is no longer done. To eliminate vacant edges, scale the layer.
Vertical Alignment (CS5.5 and later) Controls the vertical offset of the left and right views relative to each other.
Units (CS5.5 and later) Specifies the unit of measure (Pixels or % of Source) for the Scene Convergence and Vertical Alignment values when the
3D View is set to something other than Stereo Pair or Over Under.
Swap Left-Right Swaps the left and right views. It will also swap views for other 3D View modes.
3D View How the views are combined.
Stereo Pair (Stereo Pair (Side by Side) in CS5.5 and later) Scales both layers to fit side by side within the bounding box of the effect
layer. Select Swap Left-Right to create cross-eyed vision. Selecting Stereo Pair disables Convergence Offset.
Over Under (CS5.5 and later) Scales both layers to fit one view on top of the other within the bounding box of the effect layer. Select
Swap Left-Right to create cross-eyed vision. Selecting Stereo Pair (Side by Side) disables Screen Convergence.
Interlace Upper L Lower R Takes the upper (first) field from the Left View layer, and the lower (second) field from the Right View layer,
and combines them into a sequence of interlaced frames. Use this option if you want to view the results with polarized or LCD shutter
glasses. Select Swap Left-Right to switch fields.
Difference (CS 5.5) Shows a Difference blending mode for the images, useful for setting where the screen will be in the image. If you
scene convergence in this mode, different parts of the image (located in z space) will turn black. These black areas are what will be
directly seen on the screen. Anything in front of those areas will protrude from the screen. Anthing behind it will be visible behind the
screen when looking at the scene through stereo glasses.
Red Green LR Tints the Right View layer red, and the Left View layer green using the luminance values of each layer.
Red Blue LR Tints the Right View layer red and the Left View layer blue (cyan) using the luminance values of each layer.
Balanced Red Green LR Performs the same operation as Red Green LR but also balances the colors to reduce shadows or ghosting
effects caused by one view showing through the other. Setting a high value reduces the overall contrast.
Balanced Red Blue LR Performs the same operation as Red Blue LR but also balances the colors to reduce shadows or ghosting
effects.
Balanced Colored Red Blue Converts the layer into a 3D view using the RGB channels of the original layer. This option maintains the
original colors of the layer but may produce shadows and ghosting effects. To reduce these effects, adjust the balance or desaturate the
image, and then apply 3D Glasses. If you use CG images, raise the black level of both views before applying the effect.
Balance Specifies the level of balance in a balanced 3D view option. Use this control to reduce shadows and ghost effects. The default balance
that 3D Glasses sets when you select the Balanced Colored Red Blue option is the ideal value: If you set Balance to 0.0, 3D Glasses creates no
3D depth, and if you set Balance too high, 3D Glasses produces a highly saturated output.
Backward and forward compatibility
After Effects CS5 projects using 3D Glasses that are opened in After Effects CS5.5 and later will use a hidden version of the legacy 3D
Glasses effect, but will include the new options and properties previously described. The only difference is that the 3D View options
(Difference and Over Under) will appear at the bottom of the menu, instead of in its first section.
Creating a new project in After Effects CS5.5 and later that uses the new 3D Glasses effect, using the Save A Copy As CS5 command, and
then opening the saved After Effects CS5 project will cause the effect to be missing in the layer it was previously applied to.
Opening an After Effects CS5 project containing the 3D Glasses effect in After Effects CS5.5 and later, using the Save A Copy As CS5
command, and then opening the saved After Effects CS5 project will display a warning: 'Effect control conversion required in effects "3D
Glasses". Some effects controls will be reset.' The original After Effects CS5 effect will be applied and working, but some properties, such as
Convergence Offset and Balance will be reset to their default values.
Rich Young collects resources for stereoscopic 3D
Angie Taylor has a Workshop available on Stereoscopic 3D workflow for motion graphic design.
online.
Bevel Alpha effect
The Bevel Alpha effect gives a chiseled and lighted appearance to the alpha boundaries of an image, often giving 2D elements a 3D appearance.
If the layer is completely opaque, then the effect is applied to the bounding box of the layer. The edge created by this effect is softer than the
edge created by the Bevel Edges effect. This effect works especially well for elements with text in the alpha channel.
For some purposes, the Bevel And Emboss layer style is preferable to the Bevel Alpha effect. For example, use the Bevel And Emboss layer style
rather than the Bevel Alpha effect if you want to apply different blending modes to the highlights and shadows of a bevel. (See Layer styles.)
This effect works with 8-bpc and 16-bpc color.
on the After Effects Portal website.
Here are some free movies available to watch
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