Capturing an image of an off-screen window with CGWindowListCreateImage is a common way to create QuickLook style zoom-in animations, but this seems create an image with the wrong background colour, slightly lighter than the real window.

This causes a flash at the end of the animation which kind of ruins the effect.

Does anyone have any idea why this happens and what can be done about it?

EDIT: I created a

CodePudding user response：

Setting the window appearance to textured in Interface Builder fixed this. Of course that also changes the color of the window, but that is acceptable in this particular case.