.aspen-hero{
position:relative;
height:100vh;
overflow:hidden;
}
.slide{
position:absolute;
width:100%;
height:100%;
}
.slide img{
width:100%;
height:100%;
object-fit:cover;
}
.slide-1{z-index:2;}
.slide-2{z-index:1;}

.corner-mask{
position:absolute;
width:120%;
height:120%;
background:#fff;
z-index:3;
clip-path:polygon(0 0,0 100%,100% 75%);
}