Untransparent points

Hy,
I am strugling to make the inside of the points completely empty/white across a bigger document. I changed the height of the points, experimented with options an even tryed to make small circular surfaces above points to achive the effect. Nothing worked.
The problem of “unempty points” seems to be partly solved with continious lines, but never with dotted ones.

Any idea? Thanks

Solved. Just put all the points on the top layer.