Adobe Flash Professional CC 2014 v.13.0 User Manual
Page 585
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Importing Flash SWF files into After Effects
Flash has a unique set of vector art tools that make it useful for a variety of drawing tasks not possible in After Effects or Adobe® Illustrator®. You
can import SWF files into After Effects to composite them with other video or render them as video with additional creative effects. Interactive
content and scripted animation are not retained. Animation defined by keyframes is retained.
Each SWF file imported into After Effects is flattened into a single continuously rasterized layer, with its alpha channel preserved. Continuous
rasterization means that graphics stay sharp as they are scaled up. This import method allows you to use the root layer or object of your SWF files
as a smoothly rendered element in After Effects, allowing the best capabilities of each tool to work together.
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