I've just started learning multiplication animations and I'm trying to draw some torch. I've drawn the fire animation and I'm sorta fine with it, it is made of fills I've drawn with brush tool and then bucket`ed. But for an unrelated reason I want to double the framerate without increasing the speed and that would double all the frames. I was thinking, is there a way to not double the existing frames but auto-create in-between frames? I think Flash should be capable of transitioning one fill to another, maybe there's a way to get the frame that is in the middle between the two? I tried googling that but I'm not really sure how to phrase that question and all I'm getting is Tweening suggestion to make frame transition smoother, but I would like to export it to PNGs later so I would need the actual frame.
Hope somebody here could help me with that.