Not knowing where this scene was, thought it during the DS attack, there's two scenes also taking place in a hallway. Those two shots don't appear to have this type of change applied to them. Nice catch.

Harmy wrote: because the animation of the mask and the handling of the levels

What aspect of the levels makes this apparent? Wondering if another setting change applied to the whole movie might bring out more of these type of revisions. The DIF sorta hit a dead end, until a program can auto resize to solve the scaling variations.