[Question] Name of this technique?

Found some 80's posters from a skateboard brand called Vision that are really interesting visually.

I would love to know how to make them, but i can't achieve the same 'vintage' feeling.

Maybe it's a collage of photos with a threshold filter applied?

http://ift.tt/2p4fS6O http://ift.tt/2pRFI0N http://ift.tt/2p4gSro

Great design resource

100 Things Every Designer Needs to Know About People (Voices That Matter) Submitted April 23, 2017 at 12:25AM by emilianog94 http://ift.tt/2p87Trv