Ok I have a Simple Indigo question that may have already been answered.

but when rendering a image do I have to wait until the whole image is rendered in indigo?
or
can i just wait a few sec. and if the image is close to want I want but is still rendering can I save that image right then,

also will the image look pixelated if i stop it after a few sec. or will it look like a finished rendered image?

Thanks