Issue description
The Rail tool does not seem to have a default option for cable railing. Is there a way to model a cable railing without having to use a custom profile?
Solution
Using the Built-in Rail tool, it is possible to achieve a cable rail as presented without inserting a custom object.
Go to Rail Selection Settings and click the Rails tab, then add (+) your desired number of rails. Select Built-In Rail in the Rail Settings tab and customize it according to desired shapes and sizes.
You can set the post distance where your cables would attach in the Inner Posts tab.
You can set the end post in the Post tab; then, in the Post Settings, you may choose different profiles of posts and edit their parameters in the Post Components Settings tab.