Here is a little trick to make your slider loop continuously.
It will work with all elements that have a slider feature : Gallery, Basic Slider, Advanced Slider....
Step 1
Enable the Autoplay, and, most importantly, set the Speed of the autoplay to 0ms.
Set the main Speed option to 3000 or more.
Step 2
Go to the advanced tab and add this custom CSS:
%%SELECTOR%% .swiper-wrapper {
transition-timing-function:linear
}