Pipe riser graphics display unnecessary linework because of the elbow/tee at the bottom of the riser. It appears that there is a way to get them to display correctly. This can be accomplished by unchecking "Draw MEP Hidden Lines" under Mechanical Settings. But by doing so, you lose the Duct Lining, and Objects under Objects, drawn with Hidden Lines. Essentially the setting is contradictory where you need it checked for everything except Pipes Fittings under a pipe (a typical riser case).
We need two separate controls:
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