#imgholder {
    perspective: 1000px;
    transform-style: preserve-3d;
}

#imgholder div {
    position: absolute;
    top: 0;
    bottom: 0;
    margin: auto;
    perspective: 1000px;
    background-repeat: no-repeat;
    overflow: visible;
    background-size: 200% 100%;
    transform-style: preserve-3d;
}

.pic {
    left: auto;
    right: auto;
}

#pic1, #pic2, #pic3 {
    width: 50%;
    height: auto;
}

#pic3b, #pic3f {
    width: 100%;
}

#pic1 {
    left: 0;
    background-position: top left;
}

#pic2 {
    right: 0;
    background-position: top right;
}

#pic3, #pic3f  {
    backface-visibility: hidden;
}

#pic3b {
    transform: rotateY(180deg);
}

/* ----------- */




.rotend {
    transform: rotateY(0deg);
    transform-origin: 0% 0% 0;
    transition: 0s;
}

.rotleft {
    z-index: 10;
    transform: rotateY(180deg);
    transform-origin: 100% 50% 0;
    transition: transform 1s;
}

.rotright {
    transform: rotateY(-180deg);
    transform-origin: 0 100% 0;
    transition: transform 1s;
}