Walls elements below the slab are not visible on most layers even though the Wall Elements Below are checked under visible objects.
This is Defect 366566 introduced in release 6.0 and to be fixed in version 6.00.02 and later.
In the Visible Objects control, on the Elements tab, under Wall Elements Below, turn off the option to show "Outline Only", then the segmented wall elements should become visible.
RAM Concept Plans And Perspectives
Graphics Issue- Distorted graphics- in OpenPlant Modeler