Show only the stroke around a layer
I've searched all over the internet but couldn't find a proper solution.
I have an animated layer (more accurate - a composition with animation in it), and I want to only show the stroke around that layer while turning the fill to transparent.
The layer style "stroke" effect is almost perfect for the stroke, but it doesn't control the fill.
I know I can do that using the normal stroke effect, but I will have to auto-trace the layer for a lot of frames, which is a very heavy calculation.
Please help!
Thanks

