I succesfully changed the carousel to fading images instead of sliding them. And I also scaled the images via CSS so they are responsive :
img.carousel-img {
max-width:1900px;
width:100%;
}
Unfortunately on Webkit-browsers, while the fading-animation was active, every image was scaled up to its original-size. And immediately after each animation has finished, the image would be scaled correct as per above CSS-rule again (immediately, not animated). Of course the animation looked amateurish & stuttering this way. So I added
-webkit-transform: translate3d(0,0,0);
to the carousel´s fading-transition-rule and the animation works like a charm since then. So the rule looks like:
.carousel-fade .carousel-inner .item {
opacity: 0;
-webkit-transition-property: opacity;
-moz-transition-property: opacity;
-o-transition-property: opacity;
transition-property: opacity;
-webkit-transform: translate3d(0,0,0); /* WEBKIT-FIX FOR FADING SCALED IMAGES CORRECTLY VIA CSS-TRANSITIONS */
}
Here I found this solution: Why does applying '-webkit-backface-visibility: hidden;' fix issues with negative margin transition on on ios / ipad 5.1?