I made an animation where marbles fall down and roll away over a logo. Logo is passive there's a floor. Not very hard if you know a little about blender. But... Since i want to render 250 frames it takes a very long time. In the last 100 frames only the left quarter of my scene changes since there are still marbles rolling out of my scene. I think its useless to render parts again that are exactly the same as the former frame. So my question... Is it possible to only render a part of my scene? If not i think that defenitely should be made possible in upcoming versions ;-)
You could border-render a certain part of your timeline, so that you only render the interesting/changing bits. In a second step you can composite the last fully rendered frame with the partial renders.