How to force 4-quadrant generated image for collections?

[Mike-G 16]

I have several collections where Emby finds a full-frame image for the collection's primary image (I didn't specify that image manually).  For most of my collections, Emby uses an image which looks like it's a 4-quadrant image generated from the primary images of the items in the collection (again, this is without me specifying an image manually).

But sometimes when Emby finds a full-frame image for the collection, I would prefer to use the 4-quadrant generated image.  I can't figure out how to do that.  If I delete the full-frame collection image that Emby found, the image goes to a solid color background, not the 4-quadrant image.

Is there someway I can force Emby to ignore the full-frame image for the collection it found and have it generate the 4-quadrant image instead?

[Happy2Play 9785]

Can you show examples.

Collection image treatment is via the actual collection downloading a image from TMDB or The coverart plugin treating Collections/Boxsets via chosen treatment.

[Mike-G 16]

Well, I don't have the Coverart plugin installed, so maybe I need to do that? 

Here's an example:

I only have 2 movies in my Sinbad collection, so I don't want the cover art to reflect a complete collection.  So I deleted the collection art Emby found and it now shows a solid background.  The Tron Collection's art is something Emby Found.  The Transporter and Space Odyssey collections are the 4-quadrant "generated" ones I was referring to.

Edited August 14, 2020 by Mike-G

[Happy2Play 9785]

I just did test of a Collection with no images and all I had to do is a full library scan.  But this is a manual process of deleting all the original Collection images so the primary image of the collection items can be used.

[Mike-G 16]

Doing the delete and rescan gets me just what I wanted.  Thanks, @Happy2Play!!  Really appreciate the help.  I feel stupid -- I should have thought of that myself.

Edited August 15, 2020 by Mike-G