Wes Wilson is a California-based artist who is one of the pioneers in the field of psychedelic art.  In the 1960s, he designed several concert posters and handbills for The Filmore in San Francisco and, in doing so, established the visual style of counter culture.  Wilson is credited as being the first artist to design posters that made it appear as if the letters were melting or moving.  Subsequently, many artists have copied Wilson’s style but Wilson was the first.  In many ways, Wilson’s style of design has come to symbolize the 1960s.  Wilson remains active today, mostly as a painter though he still does the occasional poster.

Here are a few of his posters from the 1960s:

1966

1966

1966

1966

1967

1967

1967

1968

1968

And from 2014: