stacked round walls showing joint line in hidden line view

[michaelk 468]

I feel like I've run into this problem before, but my poor brain doesn't remember the solution. 

 

In hidden line rendering elevations in SLVPs I'm getting unwanted lines where two identical round walls stack on top of each other.

 

Is there a way round this?

 

Open GL:

 

Open GL + Hidden Line w/ 30º Smoothing Angle

[Pat Stanford 1,445]

Are you sure they are exactly coincident? If the diameters are slightly different, or the center points are even slightly off you will probably get the separation lines.

[michaelk 468]

Yep. I did a test with a curved wall on one design layer and then duplicated it to another design layer with a higher elevation. 
 

the line doesn’t show up in open gl with draw edges on but it does show up in hidden line no matter what the smoothing angle is

 

[Pat Stanford 1,445]

Looks like you are out of luck.

 

 

[michaelk 468]

That's what I thought.  Looks like I'm using the old Extract trick :-).