Wrong colour and the original soyuz thermal protection is approximately the same grey as the modern one. The old films just had been more sensitive in the green part of the spectrum.
I remember this from over a decade ago, and help me if I'm being closed minded or missing something, but to be honest I've been considering this matter resolved for a while now because I'm still yet to see evidence against green prior to Soyuz-T, only the poor film claim. If anything I question the exact shade of green, which may not have even been consistent FWIW. For it, however:
NASA ASTP documentation:
High res ASTP photography and video with american cameras and film correlates with this:
We have references with a known colour in the same images, like the Vzor, and I don't notice that any other hardware or feature seems so drastically off colour.
Period soviet photography and video I'll consider unreliable for the sake of this, and I also don't want to fall into the trap of artificial colouring of B&W, though it's pertinent to me how consistent the green presence is over the years with different capture media and environments (both indoors and outer space), and how Soviet graphical depictions include it even chronologically past the point of expectation of hiding the design from the West (post-ASTP), as they did earlier with the Kosmos dockings. Museum displays show it too. For fun, even a
soviet movie which evidently had some level of access to the space program depicts the same kind of green on what is obviously modelled after a 7K-T, were they fed a, or in on a conspiracy? A perpetuating misconception? Who knows.
As far as modern digital photography:
Period flight-like hardware
Almaz was of course developed in parallel with DOS which itself derived from Almaz and shared a lot of hardware with Soyuz (and DOS media up to Salyut 6 fit into the idea of the previous paragraph), I think it reasonable that they would have reused the thermal protection, and in that sense:
Unflown Almaz hardware 1
Unflown Almaz hardware 2
We also see that the green sightings disappeared with the introduction of Soyuz-T, were all cameras or film development updated to match for that switch?
One example of the disappearing green with (still rather poor) footage of -T. I first saw this image attributed to Soyuz-10, which doesn't at all match any 7K-T so that's not it, not sure if it would be a Soyuz-T or Soyuz-TM which the visible lack of either Igla or Kurs doesn't help, I'm leaning -TM but anyway:
I mean only ASTP is non-circumstancial here and I suppose one could then say "maybe only 7K-TM was green", which would be odd they only did that once, or maybe it was part of the 7K-S experiments that never made it to Soyuz-T and onwards. I just see way too much smoke here to not be a fire.