Ok tell me if it is what you mean...
in 4images script : there is no login page!
well, i mean... yes, users can login on every page if they want... and there are some usefull MOD to indicate the user what to do if he want to see a picture...
BUT... it could be a good thing if the user can get an
intermediate login page when he tries to access to a protected picture... and if the user can login and if he is allowed to see the picture, then he is redirected to see the picture's detail... and if it's a random picture, the user can see it directly after login!
So instead of
no information or
popup message or
redirection to index page , the user is getting a page either to be identified, or to be registered...