I found this great guide for creating tubes from Bezier curves, but I am working with an imported set of straight lines that came from a shapefile (geographic data format). I would like to render these as 3D pipes, but this guide seems to only work with Bezier curves. I do not have the option to change the "Bevel Object" on these straight lines.
Is there a similar way to just transform all of my straight lines into 3d tubes? I'm not worried about it looking perfect, I just need to see a 3d approximation of them.