I have been spending time looking for photos that match up so that I can effectively merge them. While I want the photos to be somewhat surreal looking, I also want them to look like they could possibly be real. I want it to seem plausible that the dancer is actually in the construction site. Once I have found a good match, I go to split screen view and I can drag the extracted shot onto the new background. Once there, it can be free transformed using "command + T". This allows you to resize and morph the image to fit the desired landscape.
The trickiest part is working with shadows to make the image look fully integrated. I had some difficulty getting this to work like the instructional video. As recommended, I used the drop shadow, added a layer mask and painted in the areas where the image would naturally cast shadows using the black paint brush to reveal the underlying shadows in specific areas. In the end, I settled on using the original drop shadows without the layer mask. I will continue to experiment to see if I can come up with results that are more realistic.