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Projects and compositions
Last updated 11/30/2015
3 In the Render Queue panel, adjust settings as necessary, and click the Render button to render the composition.
See this video tutorial on the Video2Brain website about how to save time with pre-rendering and proxies in After
Effects.
Note: An alternative to replacing the composition with the movie is to use the rendered movie as a proxy for the nested
composition.
Render order and collapsing transformations
A composition consists of layers stacked on top of one another in the Timeline panel. When the composition is
rendered—either for previewing or for final output—the bottom layer is rendered first. Within each raster (non-vector)
layer, elements are applied in the following order: masks, effects, transformations, and layer styles. For continuously
rasterized vector layers, the default rendering order is masks, followed by transformations, and then effects.
Transformations are changes to those properties grouped under the Transform category in the Timeline panel,
including Anchor Point, Position, Scale, Rotation, and Opacity. What you see in the Layer panel is the result of the
rendering before transformations are performed.
Note: For additional control over when transformations are performed, you can apply the Transform effect and reorder it
with respect to other effects.
In a group of effects or masks, items are processed from top to bottom. For example, if you apply the Circle effect and
then apply the Magnify effect, the circle is magnified. However, if you drag the Magnify effect above (before) the Circle
effect in the Effect Controls or Timeline panel, the circle is drawn after the magnification and isn’t magnified.
After a layer has been rendered, rendering begins for the next layer. The rendered layer below may be used as input to
the rendering of the layer above—for example, for determining the result of a blending mode.
If a composition contains other compositions nested within it, the nested composition is rendered before other layers
in the containing composition.
Note: Some effects ignore masks on the layer to which theyre applied. To have such an effect operate on a masked layer,
pre-compose the layer with the mask applied, and then apply the effect to the pre-composed layer. (See
About precomposing
and nesting.)
Collapsing transformations
If the Collapse Transformations switch is selected for a nested composition, then the transformations for the nested
composition are not performed until after the masks and effects for the containing composition are rendered. This
render order allows the transformations for the nested composition and the containing composition to be combined—
or collapsed—and performed together. The same is true for vector layers that are not continuously rasterized.
Note: Instead of a Collapse Transformations switch, vector layers have a Continuously Rasterize switch in the same
location. Vector layers include shape layers, text layers, and layers with vector graphic files as the source footage. Text layers
and shape layers are always continuously rasterized.
Collapsing transformations can, for example, preserve resolution when a layer is scaled down by half in a nested
composition, and the nested composition is scaled up by a factor of two in the containing composition. In this case,
rather than performing both transformations and losing image data in the process, one transformation can be
performed—doing nothing, because the individual transformations cancel each other.
If transformations are not collapsed, a nested composition that contains 3D layers is rendered as a 2D image of the 3D
arrangement, using the default composition camera. This rendering prevents the nested composition from intersecting
with 3D layers, casting shadows on 3D layers, and receiving shadows from 3D layers in the containing composition.
The nested composition is also not controlled by the cameras and lights of the containing composition.
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