I was just thinking. Parallel lines on cel tracings could have caused a HUGE problem with the picture broadcast, were a studio to actually try to use a low-grade photocopy tracing method.sensei wrote: ↑Thu Mar 08, 2018 10:06 am Not that your Azu copy is a fake (why would a forger fake a photocopied sketch?), it was just done on a basic photocopier, as was normal for that studio at that time. But the copiers that laid down trace lines on cels were much more sophisticated machines that didn't break up the image into parallel lines like these. My forger presumably tried to make do with a less advanced photocopier, leaving a damning sign of the cel's fakeness.
Back then, nearly all televisions were still CRT's with a "frame" scanned onto the screen interlaced, Apparently, the even numbered lines were drawn first for one field, then back up to the top and draw the odd numbered lines, resulting in a complete frame. In the analog NTSC days (Japan historically used a variant of NTSC with a different black level that of American NTSC, but otherwise fully compatible I think.) The animation had to be converted from 24fps to 480i (effective 29.97 fps).
Am I wrong in thinking that parallel lines on cel tracings would be asking for trouble when combined with interlaced broadcasting techniques?