TOPIC:

There is no need to change the Room Boundary transparency, as you can easily hide it in the 3D view. Right click in the 3D view to activate the context menu, and select View - Visibility. Scroll down the tree and in the Construction elements section locate and disable Room Boundary, and it will no longer be visible in the 3D View.

I have used the Room Boundary wall type to split a single room into what will be a kitchen - dining room. However in the 3D view, the room boundary shows as a glass panel. I have tried to drag a transparent material onto it, but it is always visible. How can I make the room boundary 100% transparent in the 3D view?