There is a beautiful quality about this image.
Looking for things that MIGHT go against it in a panel.
The OOF rock in the bottom RH corner. It might be better if you could clone that out. When you get to the area of the main rock, do the cloning with a very small brush and the hardness set near 100.
There is also a very thin white line around the butterfly's wing. Blow the image up very large and again carefully clone it out with a very very small brush, again with the hardness set near to 100.
Remember to reset the hardness back to 0 once you have finished.
These might seem small points but you never know if they might mark it down for this.
Good luck. I believe the RPS whole pre assessment meetings so it might be an idea to try going to one of these.