Revit Masking Regions in Model Families

I was messing around with a model family a colleague downloaded today. We were having problems with visibility of elements. I needed a refresh on masking regions and so I dug up a familiar article and good explanation from the Autodesk Knowledge Network titled 'About Masking Regions in Model Families'. It gives 3 examples on how to control where masking regions are drawn in model families using the 'Draw in Foreground' parameter.

You can find the link here. 

Image: Autodesk Knowledge Network