The only differences that I can confirm affect it are the shape of the pipe. I've tried making similar feature definitions to the circular pipes, but as a box or ellipse instead.
Orange=Fiber optic
Red = Electric
Green=storm
grey=sanitary
I can get circular pipes to appear with the same element templates as above.
If I use anything besides circular pipes, they do not generate.
Orange=Fiber optic
Red = Electric
Green=storm
grey=sanitary
I can get circular pipes to appear with the same element templates as above.
If I use anything besides circular pipes, they do not generate.