Help with auto-blend

@Douglas5CC7 one of the selections / blending modes that I do with my students is using the layer mask which might be a little confusing but they are non-destructive (you can edit the mask later) and give you the most control.

1. I will open two images in Photoshop
   
2. If I place the right image on top of my tent image on the left, the two images will blend together, which I really don't want. It would give me a cool effect though. But, I believe this is NOT what you want?
   
   
3.  I will make my selection now, using a variety of selection tools 
   

    

4.  Duplicate the layer that contains the window area you want to blend (Background in my example). I will use a keyboard shortcut Command J (MAC) or Control J (PC) or Layer - New - Layer Via Copy
   
   

    

5.  Now, I will open the image on the right and copy and paste in the same file as my tent image.
   
6.  Command Click (MAC) or Control Click (PC) on Layer 1's thumbnail. It will appear as marching ants with it's bounding box on Layer 1 selection
    

    

7.  Select Layer 2 or the new top image and we will create a layer mask. Click the "Add layer mask" icon at the bottom of the Layers panel (it looks like a rectangle with a circle in it)
   
   
   
8.  A layer will be created 
   
   
   
9.  At this stage, if you click on the blend modes, it's still blending the two images, which is NOT want we want.
   
   
10. Instead, we want to fill the middle layer (layer 1) with black. Let's make sure our window selection and Command Click (MAC) or Control Click (PC) on Layer 1 thumbnail in the layer
    

     

11.  With the selection active, press D to set your foreground/background colors to black and white. Then press Alt+Delete (Windows) or Option+Delete (Mac) to fill the selection with black. This will make the selection black.  
    
    

     

12.  Now you can try blend modes by select Layer 2,  to something that works for your image. For example, try “Screen” or “Hard Light”.
    

     

    NOTE: I did try 'Auto-Blend' but it took awhile to process (still processing after 5 minutes), and I need to get back to marking. But you can try auto-blend if you like