4.13 DrawMaterialToTarget + planar reflection Question

I saw this Gif from Daniel’s Tweet:

From the looks of the reflections it seems that he is using planar reflections here and the ripples have a good amount of depth displacements to them, to my knowledge any surface intersecting the planar reflection (which usually needs to be a few centimeters beneath the object to display correctly) would create extreme artifacts of reflection poking through them. How come this isn’t the case here or am i missing something? or perhaps he just put the planar reflection way down below the deformations and didn’t care about the accuracy in this case.

If this is a limitation is there a “clip plane” of some sort or a workaround to avoid this sort of thing from happening?