I created this effect by following a tutorial by Jakub Pawlowski: https://www.youtube.com/watch?v=QxIgUfVX1wo.
Jakub Pawlowski's channel link: https://www.youtube.com/@jakubpawlowski3d/videos.
The model I used for the effect was a Mabel Head Bust from PolyHaven made by Rice Cilliers: https://polyhaven.com/a/marble_bust_01.