I’ve heard the only silly question is the one we don’t ask so there it is.
To set up some light parameters instead of moving it up rendering, moving it back a bit, rendering, moving it up again, rendering, and so on I make an animation with the intensity 0 on frame 1 and 5 on frame 11 render it, see that the right value is between frame 6 and 7.
Then I make another animation with the frame 6 start value and the frame 7 end value spread on 10 frames and usually I get the right value somewhere in there.
Problem is that when I adjust the lights for back-lighting the right intensity depends on the position so I have to read and copy 4 set of parameters and sometimes I need more than to animation to find the right set of values. The thing can get even worse when I have to set both the x,y position and the z position of the light.
Is there a way to use an existing frame as the start for a new animation and another existing frame as the end?
I use Blender 2.79b.