Automatic Duck Pro Import AE 5.0 (Win 64-bit for CS5 or CS5.5) - Manual (Page 13)

This warning notifies you that some “effects” are not supported. In the context of this
dialog, the term effects refers not only to effect filters, but to any parameter or feature
that modifies your clip. In most cases it appears because of unsupported features or
filters, not any kind of dramatic failure.
Clip Markers
When Pro Import AE sees an effect it doesnʼt know how to translate, it places a marker
on the layer with the effect or parameter name in the marker.
Particle Emitters, Replicators, Text from Motion
A particle emitter and text from Motion (left) and how it appears in After Effects (right)
It is not possible for us to convert the Motion particles into particle systems in After
Effects, we simply canʼt take the parameters found in Motion and apply those
parameters to any particle plug-in in AE.
Instead we take a different approach. If a Motion project file is renamed with a “.mov”
extension, After Effects can use QuickTime to render the Motion project file as though it
was a QuickTime movie. Therefore, Pro Import AE creates mini Motion project files for
particles, replicators, text and other Motion-generated content. The project only contains
the one element so that its layer in After Effcts is discreet and only renders the one
element. This allows you to move the element in the AE comp.
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