It depends, if your game is making extensive use of these perspective tricks then you want to lock the FOV. You could even script FOV changes if this puzzle is a small piece of a larger thing. Typically FOV should be a user setting, except in cases like yours where changing it would break an illusion. IMO leave it as it is…
@Axi5 I will make a note of that and leave it as is, thanks alot! My only fear is that it will affect different screen resolutions but I suppose I will worry about that later and correct it through scripts. @monster Thanks for the suggestion. I am using Max2018 and tried to find the dropdown somewhere in the menus but…