Dark Background of Full Screen Slider

I understand why the Full-Screen Slider has a dark background to it in this theme, but after witnessing my same images displayed in the free version of Sydney’s slider (which looked absolutely great), I was wondering if you could provide a way to dim or remove the darkness to Katori’s slider?

There is no option to hide the overlay from theme settings, but you can hide it manually by adding this css code:
.overlay { display: none; }