The blue screen I used was a rack 15′ by 20′ that sported a chroma key blue cloth curtain. I would probably try a green screen for the next project. The blue often shifted to grey when automatic focus had to be used on the camera and that made keying really difficult. I used Keylight, a keying filter that comes with the Pro version of Adobe After Effects to do the keying at first. More about this in another post. I also used Boris Continuum Complete (BCC) Linear Color Key extensively. In the end I think I got consistently better results from BCCs filter.