Display field content in views single field template.. STUCK!
Ok, so how I solved it... Maybe there is other, better solution? 


I rearrangement my fields in view: first with content, title, pictures and links,
I've added one more custom text field with rewrite - then I put in this rewrtite all fields above with some twig function to display this in different ways and hide this field to.
Then I've added  last field, field_background which is one with slide background picture. I turn it to display just URL of picture and write rewrite inside to display:

{{ field_background }}  )">  {{ nothing }} 


wher nothing is my field with all content stuf inside. 


I've edited twig template for last field and write something like this:

&lt;.div style="background-image: url( {{ output }} 


so when views start rendering content it create code from my last field which is wrapprer with background image around content form other fields above. 

Well, it's work, my slides run with background picture. But I dont fell good with that, I think there is better way to get it in one field.