The only way you can do this is to assign a bit to the lines. I tried a 60* v and set it at .03, grouped and saved as a pattern.
You could assign any bit and depth you want. When you save it as a pattern it will be carved with the carving bit, not the bit originally assigned.
Another option is to save it as a .dxf file created by another software program and import the .dxf to designer.
The only issue there is that .dxf files need to be closed polygons.
Brent
A,B machines, PE,probe,conforming vectors, centerline, 2d,3d,stl and dfx imprt, rotary , 3.xx, Pattern Sculptor
OS X Yosemite
Woodwork is what I do to pay for my tool addiction.