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AutoCAD Based Opening a Drawing (Ribbon/Toolbar/Location)
Description:
Drawing looks strange, piping looks hollow and sprinkler heads a little off and Acad background looks greyish/grayish.
Drawing also seems to lag when panning, processes take longer
The visual style has been changed, to something other than Wireframe.
Also see this HydraCARD - https://hydracards.hydratecinc.com/cards/card-464
Change your view to 2D WIREFRAME
Or go to the menu [View|Visual Styles|2D Wireframe]