Does anyone know how to to do a 3d stroke/streak light effect like in the below video in Apple Motion. I know it was probably done in trapcode in after effects but just wondering if anyone knows how to recreate it?
Well if you have Motion 3 the new paint stroke features would be a good place to start (they even have "light brush" presets). It could also be done with a particle effect. (And then of course use Screen, Overlay modes, etc.)