It took me a while to work out why you would want to do this, but I think I get it now. I quite often use the animation slider in a non-linear way, to render a series of variations on a single scene; sometimes with nothing more than different camera angles, sometimes with small or not-so-small variations in the figures' poses. It's an efficient way to wring the maximum use out of a single scene set-up.

However I've sometimes been in the situation where I want to alter the scene considerably, which means going through the timeline and saving poses, cameras and lights for the parts I want to re-use. This proposed script would be very useful for that.

Mind if I fiddle along with this?