Not exactly related to the topic but back when I IVTC'ed the Technidisc LD, I came across these white horizontal lines on the Binary Sunset, what's odd about them is that they along with other dirt spots, tell us that these frames were reused a couple of frames later in the sequence but in opposite order, this was possible as Luke had not yet entered the frame. As far as I know this seems to be how it have always appeared, just thought I would share this pointless info.

The screenshots are from the Technidisc LD as the marks are mostly gone by DVNR in the GOUT.

NTSC GOUT-frames:

36266 reappear as 36282

36267 reappear as 36281

36281

36282