Nas + UPnP no artwork?

Hello

I’m a new Kodi user and have some problems with setup my libraries.

Got two media shares on my NAS: Movies and TV-shows.. The problem is I can’t get it to show artwork..

I’ve used Couchpotato and sickbeard to rename and download the artwork.. So now I got a bunch of arkwork in all my movies and tv-show folders

Tried adding the movie folder by:

Press “add video” clicking “browse” and choose UPnP..
I select my NAS and choose to ” add by folder” and choose my movie folder..

But now my movies are locked to “folder view” I can’t pick other view modes for my movie list like wall etc..

And only image showing looks to be the folder artwork

It looks like If I pick anything else then “by folder”, it will display all my tv-show episodes and movies all at once.. This is not usable.. But I do get the option to choose other view modes.

So how do I setup kodi to work with my NAS?

Thank you..