Can you remove the fill of a wall in a section/wall


I was curious if anybody knew of a way to make walls without fills in plans that are generated from 3d models. If you look at the example below, I have some walls which will be demolished, and I would like to keep the outlines visible. However, if you look at the image below, you see that the sinks (which are compound cells) are getting hidden. This in spite that the plane of the underside is under the compound cell.
Does anybody know any tricks to get this done? I hope I am just verlooking some settings.

Thanks in advance,