How does Photoshop replace the background sky for photos?

1, open the material picture that needs to change the sky background.

2. press Ctrl+J to copy the background layer.

3. Select "Magic wand tool" in the toolbar on the left and select the sky area.

4. Hold down the Alt key and click the button marked with a red wireframe to add a mask to the picture.

5. Open the sky material and drag the sky material to the original picture.

6. Move the sky layer below the character layer.

7. At this time, the top and bottom are not coordinated. Select "Image-Adjustment-Curve" in the menu bar to adjust the curve to the colors of the sky and sea water.

8, complete the operation, the final effect is as follows