Wall and beam in section view - wrong pens

[Karol Lozinski]

Hi,
I've tried to find sollution on forum, but just coulnd't find right topic. Thing is with this:

I have a beam inside a wall and all I want to have is to see clean line around the beam like this

While all I get is this


What is weird is that when the beam is aside it all looks good. Just as soon as I align it within the wall it all messes up.


Please, please help. I am pulling my hair out for an hour now. I have already tried different material priorities, and took it to extreme, I have also tried layer priorities (which are "turned on" right now, the beam has "2" while wall "1") and the last image is the best I can get.

[Lingwisyer]

Right click => Display Order?

[Karol Lozinski]

I forgot to mention - that was the first thing that I tried. Walls are at the most bottom and the beam is on the top.