How does ps make shadows of trees?

Open the picture of the landscape tree in PS, and select the magic wand tool to cut the picture (select the whole tree).

Please click to enter a picture description.

Click on the blank space with the magic wand tool, right-click and select "Select Inversion" to copy the layer (click "Ctrl+j"). The single machine "layer 1" is filled with black (click the foreground color, select black, and click "Alt+Delete" to complete the whole tree filling).

Please click to enter a picture description.

Please click to enter a picture description.

Select "layer 1" to modify the black tree, and adjust it according to the light and shadow of the original tree (find out where the original tree is irradiated by sunlight, and put the adjusted black tree where the tree should have a shadow). Select the transparency of the black tree in the layer box, and choose the appropriate transparency according to the situation.

Please click to enter a picture description.

Please click to enter a picture description.

Create a new tree "Level 2" according to Step 2. In the layer box, move Layer 2 above Layer 1 so that the whole tree is in front of the shadow. Finally, cut off the redundant part of the shadow and make a small adjustment and movement, thus completing a shadowed tree.

Please click to enter a picture description.