There is 3 ways to fix this issue.
Revit joint roof show line in realistic view.
Edit the line weight color and pattern.
Move the slider or enter a number between 0 and 10 to indicate how far a model line s endpoints extend beyond intersections.
If desired set the lines of the second roof to be slope defining except the roof line that will be coincident with the first roof or the wall.
Do not display hidden lines in this view.
There are many situations when you need to show the outline or boundary of overhead elements on your plan views.
In some cases you want to see a line between two walls especially in a case where an interior wall is joined with an exterior wall.
Select the check box to turn on depth cueing for the current view.
A value of 0 results in lines that meet at intersections.
1 st floor no overhang.
3d view of roof begin by opening the plan view in which you want to see the roof line overhang as a hidden line.
Edit visibility color and pattern.
A value of 10 results in lines that extend well beyond intersections.
Some typical scenarios are the include the outline of the perimeter of the roof the outline of an entrance canopy roof light positions etc.
Detail line creates view specific lines.
If necessary use the viewcube to spin the design to facilitate selecting the wall or roof edges.
Click view tab create panel default 3d view.
After you edit any of the above you can click apply to keep the view specific element graphics dialog open and instantly see how the change affects the model.
When finished click ok.
To enable hardware acceleration.
In the properties dialog box for the view you want to see the overhang lines in set the underlay drop down to be the level on which the roof was created.
When you set a view in revit to the realistic visual style materials are not visible.
On the view control bar for visual style select shaded.
Solution materials will not be visible with the realistic visual style unless revit hardware acceleration is enabled.
Posted on 10 03 2015 12 11 2015.
Options graphics graphics mode use hardware acceleration direct3d.
By default all walls created in revit are joined together.
This setting honors changes to line styles and visibility of hidden line subcategories as specified in the visibility graphics dialog.
Learn revit hotkeys and commands with the revit shortcut keyboard guide to help you work faster and be more efficient while using revit software.
Showing overhead lines on your plans.
It also displays hidden lines defined using the show hidden lines by element tool of the view menu.