a smoke trail with unique shapes and swirls isolated on a black background

smoke smoke trail heavy trail thinning trail black background dense plume light plume airflow narrow stream dissipating stream drift visual effect swirling fading curling evaporation condensation airy effect airflow visualization dynamic movement decrease in density transformation consistency change contrast dispersion atmospheric effects density change fine vapor environmental impact textured vapor vapor dynamics clear vapor background alpha swirl shapes unique shapes textured smoke smoke effects