Easiest way to interpolate between to point layers

[Benni1801]

Hi, so I have two point layers where one is surronding the other and the other one is inside, but there is a gap inbetween and I need to interpolate the gaps both have the same resolution (0,25m). I tried several times, but didnt find any good solution to close the  gap with points where also the z coordinate matched.

[Benni1801]

Hm thanks, so you are saying there won't be good results, basically. I calculated a few methods now, but am struggling to close some vertical gaps that result from the structure of the surface, is there a way to interpolate values along the vertical axis also?