I am glad the bug did not move that much for the shots taken!  I have used combined images at times but not posted here as I recall, mostly in attempts to produce good illustrations of jewelry and similar items.  These objects by nature require different lighting for various parts of the shot, i.e. gemstones needing more of a point source of light and metals needing some diffusion to reduce reflection. Diffusion simply kills the lighting of gemstones and bright light with no diffusion kills photos of metals..so, a combination is needed generally in my attempts by selections and not stacking of complete images, if that is what you are doing. As for this sort of image, Thundering knows lots more than I do.

Interesting thoughts you give us here.         Thanks.          Tom.