Thank you very much, using your code but setting it to
#wpsp-10911 .wp-show-posts-inner img {
object-fit: cover;
height: 50%;
}
#wpsp-10911 .wp-show-posts-inner :last-child {
margin-bottom: 0;
margin-top: -40px;
font-size:20px;
}
was exacly the effect i wanted — the first group of images
Is that the right way to point those especific posts and not all the other?