Editing Template:AyStar/styles.css

/* Fandom-style clean slideshow for Capiunto infobox */
.mw-gallery-slideshow,
.gallery-slideshow-container {
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    background: transparent !important;
}
.mw-gallery-slideshow img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
}
.gallery-slideshow-button.camera { 
    display: none !important; /* kills the ugly camera icon */
}
.mw-gallery-slideshow .gallery-slideshow-button {
    opacity: 0.9;
}