To make an animation, Sweet Home 3D assembles JPEG images into a Quicktime video.

Exactly, and there are several programs (Photoshop, AfterEffects) that can import image sequences. [font=courier new]Jpeg- png-[/font] and [font=courier new]tiff[/font] sequences are easy to process.
Since the Quicktome movie is not assembled until the image sequence is finished, the rendered images must be stored somewhere. In a [font=courier new]temp folder [/font] I would assume?

Maybe a choice to create an image sequence or a quicktime movie could be an option?

Just wondering