Go back to channels and select RGB Channel or Press CTRL+2.
Press Delete button on your Keyboard to remove background.
Copy and paste the Fish image into your main project and Flip it with CTRL+T as you can see in the Pictures.
Select Polygonal Lasso Tool and Add 4 Points in the Picture to make a Light Sun.
Select Paint Bucket Tool and Fill the Layer with a White color.
Add new mask to the light layer and Select a Soft Brush From Brush Tool and Remove some parts from the Light Layer or simply use Gradient Tool
Change Mode to Soft Light and use the Opacity to 88%.
Create another new Layer and Call it “Rain” and go to Edit > Fill or Press SHIFT+F5 then Select Use: 50% Gray and Click Ok.
Let’s add some Noise with Filter > Noise > Add Noise and Apply the Settings. Also don’t forget to use 400% as a number of the noise| Distribution: Uniform | Monochromatic.