What works with FCP – probably all of them. They are simply backgrounds on top of which you key the talent. Just make sure the aspect ratio of the set fits the format you’re using. A 4×3 background won’t work the way you want in a 16×9 sequence. However, a 16×9 background might work for 4×3 (you’d use an appropriate 4×3 area of the larger 16×9 background).
As for which to use? Pick the ones that look the way you want. I’m sure some of the virtual set companies have free or trial backgrounds you can experiment with.
I’m assume you intend to use a green screen to put your talent “on the set.” In that case, consider using Motion’s keyer rather than FCP’s, or purchase a third-party keyer. You’ll find many recommendations by searching the Cow.
John
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