Many columns in a certain layer are shown but invisible in 3d

[svpribyl]

Certain column elements are shown as if invisible, but the layer they are on is visible. Invisible is not selected. And only some of the elements on the layer are invisible. See attachment. 

[Sefa Yakut]

Hi,

This problem may be caused by the layer that contains the elements being in wireframe mode. You can click this button and change the layer visibilty mode.

[svpribyl]

It's not in wireframe mode. That would have affected all the columns.

I never determined the cause, but I did transfer the parameters from the visible ones to the invisible ones, and they became visible.

[Laszlo Nagy]

Maybe the Surfaces of the invisible Columns were set to be overridden by a transparent Surface?