I've been fighting with the underwater aesthetic today, so far I don't think it's there yet. The first attempt went pretty badly so I started a new scene and tried again, it still has some issues and will need bubbles or something in the foreground to break it up a bit.
Not sure if any of these tutorials would be helpful or not, but here are some 'underwater' things I found last year. Some of them take a long time to render but give nice effects. You can also create light rays and/or bubbles in after effects to cut down stuff in Maya...if I remember right bubbles is similar to the snowfall effect only with a few changes (ex. reversal of gravity). Anyway, maybe some of these links will help.
ReplyDeletehttps://youtu.be/sup3DZQtnNU?list=PLoXMu_lCoNQVpVejCsL7q4uF0npTzUtWr
https://youtu.be/RafJJegyCE8?list=PLoXMu_lCoNQVpVejCsL7q4uF0npTzUtWr (I tried using this to give the light effects that you see at the bottom of the ocean or something)
https://youtu.be/VlxlXXMNGdw?list=PLoXMu_lCoNQVpVejCsL7q4uF0npTzUtWr
https://www.youtube.com/watch?v=pjdmXYRzAWg
https://www.highend3d.com/maya/tutorials/rendering-lighting/shaders/c/underwater-lighting-parti_volume/page/2