The Dume Studios cyclorama is a "corner cyc" and is fully pre-lit. It is generally green, but can be painted white for a fee. It's not the size of a large cyc you might find at Paramount Pictures, but it's big enough for most scenes that don't involve crowds or too much action. It's big enough to park a car on, but you won't be able to drive it more than a foot or two! The overall dimensions are 12' by 18'.
The green screen is painted with professional grade chroma key paint, specifically designed for video production. The cyc itself is very smooth and blends seamlessly from floor to wall. It's approximately 8' high.