I still haven’t found a way to make work, getting the mesh to match the mask is a bit tricky, also it is obvious that the flat water plane isn’t following the wavy border, having an alpha blend would have helped but the water plane needs to be fully opaque behind the water border or it would just look strange when viewed from above or below in the suit (being able to see through water between the border and the fading in water)
If only there was a way to draw a thick border directly on the water mesh where the mask ends