Basic user, trying to replicate something I did but can't

 This is a jpeg that I saved. It followed me playing around with creating trace bitmap and centreline drawings. Sadly I didn't make notes of how I created this jpeg (I know, I hear you saying "serve you right").  I've been through what feels like millions of steps trying to replicate it from a photograph.

Does anybody out there recognise this kind of output style?

If so, can you point my nose in the right direction please?  It's driving me nuts!

Thanks for reading.