Open Culture has a great clip that was used to promote the movie in the early 1980s before it was released as a feature film. Open Culture also has some background on that clip that is well worth the read. Meanwhile, here’s the clip, a must see for Blade Runner fans like myself
One thing I thought watching it is how it also the end of an era. While I am guessing some companies still use matte and large scale models like they did for Blade Runner, I suspect most now use computer generated images (CGI). Blade Runner was likely one of the last of the big SF films to use this for its special effects.
If Scott does make a Blade Runner II, I am willing to bet it will be with CGI, not what is used here.