I have several set of images with a fixed background and an object moving in the foreground. I'd like to get an idea of the motion of the object by superimposing images with scaled opacity.

If I load a single bunch of N images into GIMP as N distinct layers, is there a way to automatically set the opacity of all the layers to get a scale effect from the first with P1% (e.g. 0% opacity) to the last with P2% (e.g. 100% opacity)?