I came up with this soft, more on a cool side gimp processing that I really like so I thought I would share. This is just a simple way to cool down your photo a bit. I named the processing Waves because it kinda reminds me of the salty sea and underwater, kinda. So yeah. Again, this might need a bit of tweaking on your part. This is just for this image and its exposure values/light. Oh, and the tool I used is curves. I promise to post more of this tutorials. Not just the simple ones.