I’ve created the room, and I’ve created the windows by alt-dragging as described.
However, if I want to change the dimensions, say of all the windows, I have to edit all of them. I thought it would be possible to create a Class called window so that editing the class would result in a change to all instances of the class.
I’ve selected a window and clicked the blueprints button (Converts this actor into a reusable Blueprint class that can have script behavior) and called it BP_Window.
I then drag it onto the Viewport but can’t do anything with it. I thought it might be because the Window is subtractive but there doesn’t seem to be an option to change that.
Is what I am trying sensible or stupid? If sensible, can I have some hints as to how to proceed?