The first layer is a pattern. Now the problem, the 2nd layer is always priting these strange infills (2nd picture), but it should look like the last picture where the infill is diagonal. Does somebody now how I can change this?
If you want that layer to be completed solid, you could just go to the Infill tab and enable the option to "include a solid diaphragm layer every 1 layers". That will make sure the entire interior is completely solid.
If you only want that for specific layers, just use the variable settings wizard and then adjust the same setting.