Combine images using layer masks

You can do "Masking" with any files or pictures as you like.

Here , I am using 2 files as given below : 

Final Output

How to do this ?

• Open the file (Pic having animals)

• Create a new layer (and name it as "Sun")
• Pick the "Elliptical Marquee tool" and while pressing  SHIFT , draw a sun given in the picture
• Choose "Edit-->Fill" and give an Orange shade
• And after deselecting the sun, move it in a proper place
• Selecting the layer "sun" , choose the blend mode as "multiply"
• Change the opacity to 80%

• Next , open the "sky" file

• Window-->arrange --> Tile all vertically to see the 2 opened images at the same time.
• Now , using move tool , drag and drop the sky image into the first image (Now , we can only see the sky image)
• Note that , there are 3 layers in the layer palette now. Background , Sun and Sky.
• Now , close the sky image only (second picture).
• From the layer palette , drag the sun layer to the top , so that the layers are in the order as given below : 

• That is , sun layer in the top , next sky layer and below the background layer.

Note that , which ever layer is in the top of the layer palette, that picture is displayed in the screen .

• Now , again move the sky image below the background image.The order from the bottom will be then SKY , BACKGROUND and SUN .
• By keeping all these settings , save the file in the Photoshop (PSD) format

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Will continue.....