Color Range Masking

This is probably something I will never use, but I was amazed at how easy it was!

It would normally be a daunting task to make a selection of all the ropes and riggings in the picture of this ship in order to swap out the background.

Using this tool (Color Range Masking), it took me about 10 minutes start to finish to go from this:

To this:

Ta-Da!