As much as I dislike necroposting (although is it really necroposting if it's an active thread and I just found this by happenstance while searching for something? Whatever...), I wanted to add a bit to this.
I think KRIV's original "set" as such for news updates was a fairly basic silhouette of the downtown skyline. This was before they started doing full newscasts in the mid 80s. I'm reasonably certain that at about the same time, Metromedia provided both stations similar sets, with some lighting tweaks and a different desk between the pair. There's not a substantial amount of either station's news coverage from that period out there, unfortunately.
Was able to find this image circa February 1986 though.
Came across a 1991 open on one of my "newer" old tapes, and it seemed to be a fairly wide set and desk - something I didn't really catch before. I will get around to uploading this clip at some point in the near future...
The chroma-key set set was an interim fix that occurred in 1993-94, and even then the old desk (and parts of the maroon paneling on the farthest edges, for a time) was retained. The WNYW set went into use when Fox started airing NFL games in August of 1994. It survived until they moved to their current facility in 1997.
***Ahem, you may return to your previously scheduled classic video thread...