**imagination304 said "**Even after unexpected power outages? This is incredible! Carrara will know where the rendering  stopped last time and continue?"- 
While Carrara won't neccesarily "remember" where it stopped, it is a simple matter to check the number of the last rendered frame, or image file where you saved it and then to scrub, or advance the timeline to the frame just past that point and continue rendering the rest of that sequence.

*"But Rendering as separate images( I think they are in jpeg format for saving disk spaces), will this decrease the quality of a movie? Or should we use bmp for better quality?"
*I do recommend saving your image files at the highest quality, lossless format. such as .bmp and then, when the animations are finished rendering and edited and assembled into the final movie, only then applying a video compression format. Applying compression to a sequence made up of .jpeg files would add a lot more artifacts and grunge than if you had applied the same compression to .bmps, or some other lossless file type.