How to achieve bend arm/shape shown in this video

[mercuryrising]

Hello! the arm bend shown in this video seems to be very interesting and very efficient, How does one exactly achieve this?
https://www.youtube.com/watch?v=_EWkANCJAtE

[synthsin75]

It's an arm created only with strokes. Here's an example: http://www.filedropper.com/unlimitedarm

And I have a create shape tool to help with stacking the shapes on the same vectors: viewtopic.php?f=12&t=32301

There are four shapes, an outline and fake fill for both the upper arm and forearm. The opened end is done by removing round caps.

[mercuryrising]

thank you very much, I think I got the hang of it.

So to create a outline, ill have to create a shape that is a bigger in stroke width then the filling at the front right?

[synthsin75]

thank you very much, I think I got the hang of it.

So to create a outline, ill have to create a shape that is a bigger in stroke width then the filling at the front right?

Yep, you got it.