BS3 - Carousel Fade Effect

style.css

/* Overwrites stock transition with CSS3 fade */
.carousel .item {
    -webkit-transition: opacity 3s; /* Adjust timing */
    -moz-transition: opacity 3s; 
    -ms-transition: opacity 3s; 
    -o-transition: opacity 3s; 
    transition: opacity 3s;
}
.carousel .active.left {
    left:0;opacity:0;z-index:2;
}
.carousel .next {
    left:0;opacity:1;z-index:1;
}