Which sequence of actions refines a chroma key in Premiere Pro when using the Ultra Key effect?

Which sequence of actions refines a chroma key in Premiere Pro when using the Ultra Key effect?

• A. Apply Ultra Key, use the eyedropper to select the key color, then adjust Matte Cleanup, Spill Suppression, and Edge/Transparency.
• B. Apply the Color Key, adjust feathering and tolerance, then render.
• C. Apply Ultra Key and only adjust the Key Color, leaving other refinements untouched.
• D. Add a green solid behind the clip and blur the key color to remove the spill.

Answer: (A)

The main idea is using Ultra Key to cleanly remove a greenscreen by first identifying the exact key color and then applying targeted refinements to perfect the key. Start by applying Ultra Key and using the eyedropper to select the key color directly from the footage. That sets the base matte—the starting point for removing the background. From there, refine the result with Matte Cleanup to tighten the matte around the edges and eliminate stray fringe. Use Spill Suppression to reduce color spill from the green screen onto the subject, which helps make skin tones and details read correctly. Finally, adjust Edge/Transparency to smooth or harden the edge and control how transparent the edge areas should be as they blend with the background. This sequence is best because it leverages Ultra Key’s dedicated controls for cleaning up a key: you identify the color first, then systematically refine the matte, suppress spill, and fine-tune the edge for a natural composite. Other options either rely on a different keying tool, omit essential refinements, or don’t address edge quality and spill as effectively.

The main idea is using Ultra Key to cleanly remove a greenscreen by first identifying the exact key color and then applying targeted refinements to perfect the key. Start by applying Ultra Key and using the eyedropper to select the key color directly from the footage. That sets the base matte—the starting point for removing the background.

From there, refine the result with Matte Cleanup to tighten the matte around the edges and eliminate stray fringe. Use Spill Suppression to reduce color spill from the green screen onto the subject, which helps make skin tones and details read correctly. Finally, adjust Edge/Transparency to smooth or harden the edge and control how transparent the edge areas should be as they blend with the background.

This sequence is best because it leverages Ultra Key’s dedicated controls for cleaning up a key: you identify the color first, then systematically refine the matte, suppress spill, and fine-tune the edge for a natural composite. Other options either rely on a different keying tool, omit essential refinements, or don’t address edge quality and spill as effectively.