I have this client which strangely wants to have custom fields in her blog posts. One for her thumbnail, and one for her post top image. My thought is that maybe there would be a script to set it that way. I have placed a link to the image below for a better understanding of she sent me. I did the custom field for the thumbnail but when I remove the custom field from the post, it still has the container for the thumbnail image on the homepage (link below).
Homepage - in testing