I just drew a mask (outline) surrounding a an object on AE and I want to have some sort of lens flare or an effect such as a Light Factory’s LE “drawing” the outline of my object. I think I may be able to do that using some sort of basic expression (using the pickwhip). But I can’t remeber what “tracing/paiting” effect I should use so I see my path being “drawn”… Any suggestions?
This might give you some ideas. Select your mask shape, copy it, and paste it into the “Flare Center” attribute of a Lens Flare applied to another layer. That will give you a 2-second animation of the flare moving around the mask. Set that layer’s blending mode to “Screen” so you can see the layer with the mask. Apply Stroke to the layer with the mask and keyframe the “End” parameter going from 0 to 100%, with it reaching 100% at the last keyframe of the Lens Flare.