The other reason was the company that owned Bell Labs, AT&T, did not like this kind of flossy stuff going on. I didn't know that then. I know that now because I've found the correspondence from AT&T criticizing Bell Labs. Bell Labs management defended it. So to handle this, they suggested I call it Patterns by 7090.
A. Michael Noll, A. Michael Noll on 1960s Computer Art at Bell Labs
I know that A. Michael Noll was the first person, at least as I understand it, to make digital computer art globally, and the year before, in 1962, with Patterns by 7090 at Bell Labs.
Peter Bauman, Michael Spalter on 1960s Computer Art