4k time lapse of twilight sunset surrounded by light clouds turning into darkness as the sun sets downwards behind the vapour silky sheer rolling change in the sky

sky clouds skies cloud cloudy overcast vapor smog vapour thunderhead darkness sunset lapse smoke fogginess twilight light nebulosity veil obscurity haziness mist gloom dark evening fog haze setting dim 4k steam time murk nebula downwards blue change billow lit sheep dimness changes puff scud rolling silky silk sheer film