Another way to think about the horizontal scanlines is that within the lines, there is really a continuous analog signal, undergoing various (analog) filters al

Another way to think about the horizontal scanlines is that within the lines, there is really a continuous analog signal, undergoing various (analog) filters along the way from initial detection up through final display, but between scanlines there is discrete sampling. This can be emulated by digital filters, but even if the final display doesn't show the scanlines, there should be a different point-spread-function in the horizontal versus the vertical direction. There's also the possibility of emulating how the time resolution could be less than the refresh rate (sometimes sluggish phosphors create a kind of motion blur). Really old tv transmissions also had an effects like a high-pass filtering (I think to show better detail within limited dynamic range)[1], and how really bright spots would be surrounded by dark halos [2]. The distinctive "look" of old TV has a lot to do not just with the CRT display, but the characteristics of the analog method of video signal generation, in a video camera tube [3] that had its own cathode raw sweeping across the source image. [1] look at the edges of the desk at around 0:36 in https://www.newsweek.com/wmttv-black-white-color-first-time-tv-news-1695871 https://www.newsweek.com/wmttv-black-white-color-first-time-... [2] https://movies.stackexchange.com/questions/113358/whats-with-dark-shining-in-old-black-and-white-tv https://movies.stackexchange.com/questions/113358/whats-with... [3] https://en.wikipedia.org/wiki/Video_camera_tube https://en.wikipedia.org/wiki/Video_camera_tube