Jim Frawley's Camera Tests

From Muppet Wiki

Prior to production of The Muppet Movie, director James Frawley shot a series of short camera tests featuring Kermit the Frog, Fozzie Bear, Sweetums, and Miss Piggy, to determine how the Muppets would appear when filmed in real-life locations.

The camera tests appeared on Columbia Tri-Star's 2001 DVD release of The Muppet Movie.