Lastolite style large pop-up Green / Blue Chroma screen. We have used this to create a portable studio in minutes - anywhere. Don't worry about excluding light - just add infinite black afterwards. We have even fooled the After Effects guys with the results.
Warning: Whilst putting this kit up is easy and using it will make you look very professional... you could blow this in a second if you don't practice putting it back in the bag before the shoot. And it won't fit in a car unless it is back in the bag...
