At Tuatara, we just released our third plugin called QuickThumbnail!
No more assets with no thumbnail, easily control how assets look in the Content Browser to have a clean workspace!
Features:
Here are some examples:
New documentation for Quick Thumbnail! We switched from Google Docs to Notion. It’s so much easier to find your way in the docs. Tell us what you think 
We just released QuickThumbnail for Unreal Engine 5.3, get it here!
I think the thumbnail problem is really a problem.
My assets always look like this, but your plugin works with a tipology of assets that is too narrow. This is how my assets look like. And changing thumbnail is also needed for statich meshes and materials above all. I know there is no way to do that, but maybe some trick? Like puttin materials in some other classes, or I don’t know…
As you said, it is not possible to edit Materials and Meshes thumbnail at the moment in Unreal Engine.
One solution would be to create a custom Material and Custom Mesh type, but that’s hacky and if one day you don’t use QuickThumbnail, your assets would be broken.
I hope that in the future the thumbnail API evolves so that we can customize all of them.
