DarkPhazeGraphix,  "Well I have to say that on this I disagree."

Disagree with what? I agree with:

1. professional courtesy, yes
2. being ethical, yes

So what do we disagree upon? 

There can be a little impractical to get hold of 4-5 different photographers found on the internet for permission to use a little tree or whatever. IMO this thing has gone too far. Copyright was invented to protect real works of art, like Turner or Monet.

By the laws of United States, it is allowed to use several copyrighted images to create a composition if you recreate/repaint all in a different medium and inject clear originality into the product. You don't have to ask permission.

I hope this is sorted out now.