2. Activate the pen tool on the spare material, draw the required selection path, and then convert it into the selection.

3. Then press ctrl+J to copy the layer, and then use the moving tool to move the image to the character material.

4. Use the "Free Transform" command and hold down the shift key to adjust the appropriate position and size.

5. Activate the eraser tool, set the parameters as shown in the figure, and erase the edges and corners to make them soft and uniform.

6. Use the daubing tool to daub the part of the arm exposed to the clothes, as shown in the figure, and then select the eraser tool to erase it again. The changing step can be carried out many times to obtain the desired effect.

7. Process skin color and start the color balance command. As you can see, we need to reduce the red color of the image. Parameter settings are shown in the figure.

8. Click the Curve command to increase the brightness of the skin.

9. Hold down ctrl+shift+alt+E, and you will get a merged layer. Then start the pen tool, draw a path in the blank space under people's armpits, and then turn it into a selection.

10. Replace the drawn selection with sofa, and the final effect is as shown in the figure.