Ghost lines appear in extruded geometry

[Anonymous]

After drawing lines/arcs, joining and then extruding, phantom lines appear in the geometry in Model space.

They shift/disappear/reappear sporadically as I pan and zoom. Seems to only effect shallow extrusions (1/4" lauan material).

Any way to fix this?

[maxim_k]

Hi,

I cannot reproduce this issue on my side with any Visual Style. Can you attach your drawing here?

Maxim

[Anonymous]

I have the same problem except it is in paper space.  Phantom lines will appear on objects, usually connecting with something like a hole in the solid object.  If I zoom in close they go away.  But when I print the layout the lines print as well.  I have attached a page where this appears.  It is in an isometric view of a round flat lid.  Any help would be appreicated.

[maxim_k]

Welcome to Autodesk Forums!

Hi,
Could you attach DWG file with his issue?

Maxim

[Anonymous]

Here is the cad from which that layout came from...you can see lots of examples of the issure in here.  Thanks

[maxim_k]

Hi,

I can reproduce the issue on my side.
After quick investigation I can say that this issue could be a bug in AutoCAD (in both versions - for Mac and for PC): these lines appears in viewport with visual style other than 2D Wireframe when 3D Solids are extremely thin in compare to its area.
Look here:

http://forums.autodesk.com/t5/autocad-2007-2008-2009/quot-ghost-quot-lines-on-thin-3d-solids/td-p/19...

You can try to use SOLPROF workaround or create flatten view of 3D objects with FLATSHOT command, than put the result to Layout.

Maxim