Scattered Sketchy Lines in a Walkthrough

[Anonymous]

Hi.

I've been facing this problem whenever I export a walkthrough video from Revit. There are these scattered sketchy lines that appear without a warning that make the presentation look unpleasant. I really do not have any idea what to turn off in the visibility graphics. One thing's for sure, these lines that appear in the model are caused by the steel members from the structural linked file, some of them are railings, trusses, and steel columns, just to name a few.

Can anyone help me debug this problem? I really need to submit a walkthrough presentation of the project.

Thanks in advance.

-Ace