Shapes overlapped in pre-comp, transparent fade in visibility I have two white shapes that overlap on a purple background, which are in a pre-comp. One in animated (an arm) and the other is not (the rest of the body).

When I fade the pre-comp in, from 0 to 100 opacity, I can see the parts where the shape overlaps. This is made worse by having a motion blur, which seems to multiply the blur in that area.



Do you know how to avoid this situation, and to have the two shapes behave as one.
Pretty sure this is due to the little sun icon - the "collapse transformations" icon.. 
See more here: http://helpx.adobe.com/after-effects/using/3d-layers.html

It's to do with what order 3D comp layers are processed when they're precomped.