Usually you use a seamless white when you want to take pictures on a white nutral background.
There are several variations on that, if the subject is small, you can use a piece of paper, and it you want something a bit more permanent you can build a cyclorama wall, but what about photographing a fire truck with that white background?
You would need a huge seamless. Or… a huge egg shaped studio.
The folks over the Sydney based The Good Egg Studio shared a time lapse of how they built a huge cyclorama – or egg shaped – studio. The studio measures 12m x 17m and is 4.8m tall. That’s enough for a fire truck fleet and lights.