Originally Posted by ABCTV99
Some of those episodes have upwards of 30 or more FX shots, not to mention all the split screen work on episodes where there are two Picards, Data/Lore, two Rikers, etc and Okudagrams and console displays
and new matte paintings and Enterprise shots (they were composited on video).
It should be pointed out that, up until (I believe) Voyager, the computer displays were actually backlit hard stencils, not digital. There was a metal layer under the console with cutouts to let light show through to create buttons. Even some of the computer displays were created this way, with only animated displays being composited.
The star fields outside the windows (when not at warp speed) were actually created with a moving black curtain with reflective dots on it. The main viewer, however, was a digital matte shot. When not shown, the green screen for the viewer was removed to allow cameras to shoot the bridge through the opening.
If I remember correctly, Voyager was the first to have flat touch displays that actually responded to touch (lighting up or turning off, for example).
I believe Enterprise used digital effects to create the closeup interaction shots of the displays.
Likewise, DS9 was the last ST series to use physical models for many of the ships. Voyager and Enterprise used CGI.