We have successfully implemented a SharePoint 2013 farm and web application using FBA.   We used the FBA Pack which sets up a default page which asked the users to select Windows or Forms Based authentication.  We would like to create two login pages, one for Windows and the other for FBA.   We are also using Host-named Site Collections.   What would be the best method to accomplish this?   We have tried to customize the login page, but it still requires us to use both Windows and Forms Based on the

Hi,

According to your description, my understanding is that you want to create custom login pages for both FBA authentication and Windows authentication.

I suggest you can create a custom login page with a dropdown list to select which authentication type to pass the site collection.

Here are some detailed articles for your reference:

Custom Login Page(Claim based Authentication and Windows Authentication ) for external Users

SharePoint 2010 automatic sign-in with mixed authentication

Thanks

Best Regards