is it possible to add a property to an existing model to toggle its visibility? I have a particular house model (I purchased, but did not create) that I'm constantly having to go into it's props, find the ceiling prop, and then check its visible box so I can see inside the house from above. And then when done, repeat it all and uncheck it before I render. Is it possible for me to add something so that all I have to do is open the properties of the house object and have access to the ceiling visibility right there?