How to make this effect in Illustrator or Photoshop? (LOCKED—DUPLICATE THREAD)

[slam629]

I think it is AI, correct me if I'm wrong.

Thanks in advance

[Monika Gause]

In Illustrator try the plugin Phantasm or the plugin WidthScribe

In Photoshop convert your image to Bitmap (1 bit image) using an appropriate screening setting.

On a Mac try the application Vectoraster.

[Myra Ferguson]

I'm locking this thread since it is a duplicate post with an active thread with more content here: How to make this effect in Illustrator or Photoshop?