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Ability to zoom in-out camera with scroll wheel and possibly also using specific keys like “[” , “]”
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Switch between first person / third person etc. but game creator has option to disable/force one of those.
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Camera FOV change also can be disabled/enabled by game creator, but you can either force one or have that player can customize their FOV as however they feel like it.
All of these to be able change on playmode at any time, because I think it’d very improve playing experience to be able customize as heck much you want to and you are allowed to, but of course game creators will have option to change it maybe because game is not meant for it, but ones that are should have access for such options.