If we assumed correctly, you should be naming only image files as your text should be included in a post that will bear the name of the architect and the case study that you have been assigned to. Image files should be named:
[architect last name]-[year]-[recognizable name of case study]_[progressive number].[extension]
Please note that:
a. Names should be either all capital or all small letters. So make sure that when you are naming something you are not using small and capital letters in the same word.
b. In general: use hyphens [-] instead of underscores [_]- Underscore should be used only just before a progressive number.