The main structure will be:

Section
    -> Column (Image, Overlay)
        ->. Inner Section (Set height, code)
            -> Column
                -> Header, Text, etc
    -> Column
        -> Inner Section
            -> Column
                -> Header, Text, etc
Section
…

Code:

selector {
    opacity: 0;
    transition: 0.5s ease-in-out;
}

selector:hover {
    opacity: 1;
}