Interesting start, thanks guys, including you Midnight Trooper. I changed the title as recommended.
Very interesting about the ANH base for Gino's helmets but I guess that will be for another thread sometime (I could show that isn't the case). Thanks. Since I like how this thread started in relation to the RPF thread let's continue with that.
There are distinct differences in the shapes of the eyebrow flarings of the ESB and ROTJ domes which Paul shows and I tried to hint at in the RPF thread when I replied to Mac. Even if you sanded down the eyebrow flarings a lot, it would be very difficult to get such different curvatures to the eyebrows (seen in profile view, not front view) if they were from the same mold. I was just focusing in the RPF thread on the masks but according to Gino's theory, the domes should be from the same ESB production mold as well. I didn't really get a chance to go into more detail about differences between ESB and ROTJ faces on the masks but I provided that list of differences which would mean there would have to be many many slight modifications to each mask.
Maybe as a good starting point, since my knowledge of ROTJ is least among the OT, why don't we identify the specific screen ROTJ helmets and go from there. Is there just the one hero, the reveal and the stunt or are there more?
One thing I'll mention is that there are hero ROTJ with a boundary on the lower lip/chin area and I've been trying to figure that out because it looks like it is also on Brian Muir's ROTJ mask.
Here's are some HD screencaps I obtained for reference...this looks like it has a pretty high mount...
So what is this? It has the neckpiece with a clear boundary on the chin but the neck looks painted...???
Another view...
The stunt helmet...a good shot of the dome shapes and curvatures....
Here one can see that the ROTJ dome ridge would have to be built up on top of the ESB...there is also a difference in the slope curvature of Vader's right cheek under the eye...with the ROTJ showing more of a slant...indicating a different mold source...not to mention the consistently narrower nosebridge.
Here we see the dome flaring curvature differences...also the ROTJ side of the U-shaped part of the nose was reworked. You'll notice the noseslots were recut on the ROTJ.
Also if it is known for sure certain ESB helmets were carried over to ROTJ, then which ones?
Here is that original ROTJ mask Gino pointed out from CIV next to the Paul Allen ESB original stunt. I've scaled the mounting rings since presumably they were a found item so wouldn't be different between the films. Even though perspective is different, I can tell that the crown of the mask of the ROTJ is smaller than the ESB, and that is something born out by the comparison I did before of the ROTJ next to the ROTS, showing it is quite a bit smaller, yet there doesn't seem to be any disagreement that it is an original ROTJ.