Change the background in Photoshop
You will learn how to change the background of an image by picking an object from one image and placing into another image by using the options of filtering and merging.
(BEFORE) OBJECT 1:
(BEFORE) OBJECT 2:
Insert the picture that you want to change the background.
Unblock the Layer by double clicking on it and press ok button.
Now choose the polygonal lasso tool.
Go to select > inverse (shift + alt + I) then press delete button.
The result would be
Go to the eraser tool with the size of 20px of soft brush.
Move the soft brush to the edge of the borders by using eraser brush tool
You can see the difference in this image
Now add the background on this image
Rasterize the layer by clicking right on the sofa layer
It will become like this
Now, resize the image by clicking on ctrl +T And place them on the floor
Making the shadow of cat on the floor, select the object layer and drag to the new layer so it will be the copy of the object layer
Drag the copy layer down to the original layer
Now resize the shadow layer by pressing ctrl +t as you want.
Selecting all the layers by pressing shift key and click right to the layers then go to the merge layer