Is there a way to:
1. Model a background model in Blender (like a room or a hill or whatever)
2. Point a camera at the model (framing it in the camera view)
3. Put that “camera view” onto a plane that is behind the lines in a panel
Sort of like using the “camera view” as a green screen behind the grease pencil lines.
Not just an image plane but a “camera view” so that you can adjust the angle, distance, aperture and so on.
That would REVOLUTIONIZE doing 2D art in Blender