@box said:

Just divide the straight lines into a few segments and weld them back together, then they will be seen as a 'curve'.

@Box

Ah. that method worked.

I didn't think of that method where I can weld the straight line after being divided.

that was the last method I missed when I was having trouble with how to use the tool.

Thank you for helping me out and that solved my problem.

EDIT 1:

https://imgur.com/a/Tlcww4z

what Black arrows are pointing at is the rails (the straight lines) not being at the correct angle (referring to red line)

Is there a way I can fix this?

Hello, I'm new here. I have been using that plugin for my own personal projects until at one point, I encounter a problem. I noticed this plugin can only work with any types of curves or arcs. But what about 2 curve/arcs and 2 straight that would get me what I wanted to build something like the waffle pattern.
good example is:
https://imgur.com/a/c6GTFmz

@Tig, Can you improve the Extrude edges by rails by faces tool to have unlimit feature where i can use either straight line or arc/curve lines?