Is this what's meant by the 45 degrees?
That the grill drops inwards at an angle?
That would explain why the lines look different in various Sideshow photos.
https://www.oohyeahzone.com/collection/cb/cb4b-lifesize-vader.html
Correct. It's more like 50 or 60 degrees, but I m not splitting hairs...
Point is, the sideshow sculpt adds to the the flatness of the sculpt by doing that.
That's a common mistake in the depiction of vader, but makes all the difference...
(Much like Artoos head...it is a common misconception that his head is
Half a sphere.
Rather it is an egg shape...the "pointy" end...
And many sculptors get that wrong, resulting in fat headed Artoos --like the new 6" scale by hasbro...
One of the best depictions is the 1/6 scale artoo...correct egg shaped head...)
These subtleties are what gives them those unique traits...if vader had the wrong coloring or number of "teeth", but had the correct angles on his head, he would still look better cuz the prevailing shape of the head would be correct...
Forget the little details,...having the overall correct prevailing shapes and proportions come first...then the details follow...make it worth the price you pay for these higher end collectibles