Hi! As I see, this feature was planned in Unity 2018 https://unity3d.com/unity/beta/unity2018.3.0b4
I’m on Unity 2019.1.15 and still have issues/artefacts with UI/Image displaying sprites that have Mesh Type = Tight and are packed in atlas.
I’m using the same sprites for SpriteRenderer and UI and it would be cool to reduce build size with Tight packing.
There should be an option for the Image component to use the Sprite Mesh. If it isn’t there for you, enable debug mode for the inspector and it should show up.