More progress

Today I kept messing around trying to get a voronoi 3d overlay so that i could then cut the holes and be ready to export a voronoi wire frame. This is what I have so far without any luck..

As you can see, when I connect the brep to extrude, or any other similar node, I get this effect all over the D. I want to localise it within itself so that when I cap it, the solid faces disappear leaving only my desired wire looking voronoi 3d shape.