2. Import two material layers into PS and drag the character layer into the grass layer. And adjust the position.

3. Then click on the graphics layer, hold down the Ctrl key on the keyboard to create a selection, and then create a new blank layer filled with black.

4. Select "Ctrl+T Free Transform" on the keyboard to flatten the shadow of the character. Right-click again and select Twist. Adjust the shadow to the appropriate position.

5. Select the layer panel and reduce the opacity appropriately.

6. Finally, adjust the upper and lower order of layers, that is, get the effect that people stand in the grass with shadows.