I created a parametric louver family with help / instructions from one of Mr. Spot's posts.
It seemed to work well, until I noticed that the louver blades were showing up in plan views incorrectly. The family looks good in elevation, section and normal plan views; however,
if one raises the louver sill to above the view's cut plane, one sees an isolated louver blade.
The blades are a nested family within the louver family, and I suspect the problem lies within the nested louver blade family. I tried to modify the blade family without success.
Thoughts are appreciated,