As a completely separate thought, FP uses default shaders which BAM may be able to completely redefine. Those act based on camera position and are responsible for overall appearance, and things like enamel mapping. For example here's a bumper and a wall with normal shaders, and the same but loaded into the backglass with cheats and therefore lacking the shaders used for objects in the playfield. Without shader, the object is completely flat and irresponsive of camera movement, with no lights or shadows at all.
Flipping a shader on its head so much that it "acts" as a mirror and load it into an object may
technically be possible, but it would be incredibly hard to achieve. BAM gurus may disagree though, some years ago I would have said the same about things that ended up being implemented.