
1. Quick Selection tool to put face, hands and shirt on separate layer
2. Duplicate Background layer, rectangular selection of twins, Edit > Fill > Content Aware to create wall layer
3. Duplicate Background layer, Add bank layer below (with wall below that layer) and used Blend If* to create image 2 above
4. Merged down blank layer so that image 2 its a single layer. Erased dark area between legs
5. Placed wall layer below it.
* Split the Blend If slider to avoid a cut out look.
No brushwork.
The background wall has the original modeling rather than a flat tone because of Content Aware Fill when creating the wall. Seems more authentic.