This is just a quick concept I did for a shot I am planning on doing sometime soon. It is really dark, I need to lighten it up a lot so people can actually see what is going on... and then make it look like it isn't underwater.
This was a shot that I did for the student made short film "Keoxia." I did the matte painting, 3d grass, and the compositing. click here to see a before and after.