I have checked on multiple computers, and in Firefox and Chrome, and on some monitors the slider image jumps up a considerable amount.
The code I used to do this is:
.home .home-slider-wrap, .home div#rev_slider_1_1, .home .tp-bgimg.defaultimg, .home .forcefullwidth_wrapper_tp_banner, .home .rev_slider ul {
height: 63vh!important;
}
.home .rev_slider_wrapper, .home div#rev_slider_1_1 {
height: 100%!important;
min-height:63vh!important;
}
.home .rev_slider ul {
max-height:700px!important;
}
(I admit some of this code may be unnecessary, was just trying to get it to work).