Does larger helmets or smaller helmets affect anything?
Not that I have noticed.
They do not, they’re entirely cosmetic. The physics meshes would be too complicated for the game to run smoothly if they had to recalculate the hitbox for each individual armor.
No. It is latency/desyncronization that causes weird hits like “those.”
Everyone has the same hitbox, except Reach’s Elites. Theirs is larger, but they all have the same, larger hitbox relative to Spartans.
Well… Did I say “except Reach”? Cause Halo3 does offer a slightly side-ways skewed but proper head-on registration;
https://youtu.be/Kg61da6d_dw
(Elites have no neck!)