Civil 3D 2016 - Viewport Issues

[Steenix]

I'm having an issue with viewports in Civil 3D 2016 - hopefully someone here can help me out.

Lines and arcs are displaying improperly through my viewports. I have not been able to determine what causes this to occur, it seems to happen to me randomly. Below are screenshots that show this issue.

In the above screenshot, my line coming out of the left of the #7 box is displaying just fine. However, if I zoom in...

All of a sudden, the lines cross! If I adjust my zoom again...

Now the lines don't even touch! Also, now my centerline looks all wonky. I did not modify any objects between taking these screenshots - I only zoomed in and out.

Functionally, this is not a major issue - everything still plots just fine. But still, this is maddening!

Has anyone else had similar issues?

-Austin

[Jeff_M]

Is this when multiple Modelspace Viewports are in use?

[Steenix]

In this case, yes - there are multiple viewports. However, I've had this occur when there was only a single viewport in the layout tab.

[Jeff_M]

Itsounds like the same issue reported here: http://forums.autodesk.com/t5/autocad-civil-3d-general/c3d-2016-curves-incorrectly-displayed-with-mu... although this could just be a REGEN is needed.

[Steenix]

I think I figured it out. I disabled "High quality geometry" inside the "Graphics Performance" options, and that seems to have fixed this issue.

Of course, this wouldn't be AutoCAD if a solution didn't create more problems! Once I disabled high quality geometry, my cursor disappeared inside of one of my viewports! It still shows up fine in any rectangular viewport, but it does not show up inside of my clipped viewport...

[rkmcswain]

I'm leaning more towards Jeff's idea about the REGEN, maybe combined with raising VIEWRES up a bit .... *only* if it's set very low like 25 or 50 thought.

IIRC, each viewport has it's own viewres setting.

[Steenix]

I should've mentioned - I tried regen, closing and re-opening CAD, turning the viewport off and back on again, and none of these seemed to work.

Also, I tried the viewres command - mine is set to 1000

[rkmcswain]

Okay, after I went back and read the entire thread that Jeff posted, maybe there is more to it. I was initially not considering bugs in my thought.

A good point was made there about how NVidia could be to blame.