how do get the volumetric clouds in front of a media plate (green screen key) so the person looks like the clouds are in from of him

how do get the volumetric clouds in front of a media plate (green screen key) so the person looks like the clouds are in from of him some times blocking the plate using UE 5.1 . I also tried ultra dynamic clouds but it just looks like he is not in the same space with the clouds t