Smoothing a wrinkled black fabric backdrop

A pregnant woman in a mustard gown and a man kissing her belly in front of a creased black fabric backdrop, with a metal shelf, a window and a light stand visible beyond its edges.

BeforeAfter

ChangedShelf and wall covered by the backdrop
ChangedCreases in the black backdrop smoothed
ChangedDust and folds on the floor cloth cleared
KeptBoth poses and faces
ChangedWindow and light stand covered by the backdrop
KeptMustard gown, jeans and stump

Keep in mind: Beyond the edges of the original cloth, the backdrop is filled in by estimate. The fabric texture is evened out, so the backdrop and the people are not pixel-identical.