I love flowing water and it was my old dream to make something like this. Finally I've made it in a form of a bg for a platformer. Tools: Photoshop 4-frame water animation. 8 frames total for crazy-super-sonic-badly-animated-birds. )
Mostly by the tone and saturation. Background can't have light tones above certain level. White is absolutely forbidden. This particular work might brake the rule, I don't remember paying attention to this aspect in this work. Because it wasn't really intended to be used in a certain game. The waterfalls and jungle trees stand far too much, from my metroidvania world.