problem slider image size

I think the issue is with the ratio of your picture: I use 1160×480

Thanks Pityvert,
I tried with the size you suggest but it doesn’t work…

Every kind of size I use, it appears small and cropped…
there’s something to change in css?

??

Did you upload the image into ‘featured image’?
It needs to be into background image

The problem is the featured image.
I uploaded a background image and I need an image to enter later with the animation
(like the rocket in the demo https://themes.bonfirelab.com/bearded/).

Thanks!