Images as Backgrounds
Allow a scene to contain a background that is an image, not a color. This images should also be considered "invisible" by Doodly so it doesn't erase before drawing over it. A simple "Set As Background" checkbox in the settings should allow this function. These images would not be drawn, but just appear as part of the new scene. This would allow custom backgrounds to be drawn over without Doodly thinking it needs to first erase before drawing.