I would normally say most definitely always BUT there's nothing wrong with adding a bit of imagination into the mix. For example, fantasies/science-fictions. The former is -usually- set in something like medieval times but with added dragons and powerful wizards, and then we've got steampunk, with an -alternate- era. Now, bear in mind I'm talking imaginative things here, NOT things, such as, say, a 'colour blind' cast where your story's set in, say, ancient-medieval America and all the characters are white. What the hell.
Anyway, you do need a good balance between 'real life' and 'imagination'. Too much of the former, then you've got a documentary. Too much of the latter, then your audience can't relate.
However, if it's something like a period drama we're talking about here, then, really, you should at least -try- to have everything historically accurate except for the characters (IF they're made up, of course!).
Hopefully I made sense
Edit: Just to clarify, because I seemed to be considering mainly broadcast mediums, that this can apply to anything and everything involving story telling and what have ye.
Captcha: 'duvet day' Don't I know it!
Anyway, you do need a good balance between 'real life' and 'imagination'. Too much of the former, then you've got a documentary. Too much of the latter, then your audience can't relate.
However, if it's something like a period drama we're talking about here, then, really, you should at least -try- to have everything historically accurate except for the characters (IF they're made up, of course!).
Hopefully I made sense
Edit: Just to clarify, because I seemed to be considering mainly broadcast mediums, that this can apply to anything and everything involving story telling and what have ye.
Captcha: 'duvet day' Don't I know it!