Edge Cleanup (C) - Set how much additional cleanup to apply to the outer edges of the image Edge Cleanup Control

Click the control icon or press C to activate.

Edge Cleanup adjusts for best appearance of the image edges.

Increase this value until the edges are just filled-in after setting the Smoothness slider for the best apperance of the subject material at the center of the image. Take care not to make it too high.

This control is part of the Flatness Derivation Settings control group.