Animation , allow to load a previous animation (a jpg/png series) as background

[PhotoComix]

Maybe my suggestion is similar to that of Rama1 , anyway to make clear what i would like a image help much



As now i  may well move the vehicle but on a fixed background, i would find amazing if i could move both FG and BG

And i could easily do if would be possible in M3D animation option, use a previous M3D animation (or anyway a series of jpg/png) as BGs for the new animation

NOTE
For "series of jpg" i mean a sequence in numerical order as going from 000001-name.jpg (or simply 000001.jpg) on :
with bg 00001 loaded for the first render of the animation,automatically replaced  with 00002.jpg for the second animation render and so on