Where does the rainbow end?
Only the source image and a lot of work with gradients was used!
I won't upload a step by step guide because my computer is pretty much full right now, so i'll just describe my method:
The sky was a blue to white gradient, and i just blurred that back of the water to increase depth.
I made a water abnormality using a high feathered selection and the liquify filter, then i added a a russel's rainbow to the image. that can be found in the drop down menu in the gradients tab under 'Special effects'
I then changed the opacity to 60% and changed the blend mode to screen.
I added a Spectrum (again in th gradients tab under 'spectrums') and placed it in a high feathered selection, then i just reduced the opacity to about 60%.
That's it!! (2 years and 328 days ago)