Disable the 3D renderer in the scene editor when there is no 3D object in the scene. It cause artefacts on 2D sprites.

[Bouh]

Description

When importing 2D sprite in a scene with a cutout there is in the scene editor a grey border on 2D Sprite objects which is probably due to the 3D renderer.

There is 3D object on the screenshot below, A shelves, a doormat, and a panel sprite.

Solution suggested

Disable the 3D render when there is no 3D object on scene editor.