Generic Model families can be a bit overbearing when it comes to visibility. Unfortunately, you can’t usually change the Show only if Instance is cut property for Generic Models… unless you switch them to a Category that allows this to happen, like Windows.
Andy Milburn describes it thus: “With a window family this is easily solved by checking the “only show when cut” box. In a generic model family this feature is greyed out.
You will have already guessed my solution. Swap the type to window, check the box, swap back again to GM. It stays checked even though it’s greyed out.”
View Ranges (and TOLERANCES) Explained *REPOST*
Things like –
Walls shorter than 6 feet (approximately 1.83 meters) are not cut, even if they intersect the cut plane, and
There are a few categories for which an element located above the cut plane but partially below the top clip is shown in plan. These categories include windows, casework, and generic model. These objects are shown as viewed from above.
One easy way to determine if a family Category is Cuttable is by looking in the Object Styles dialog box. If there is a gray box in the ‘Cut’ column, that Category is not cuttable. See image below (from 2012):