Oceans

Sunset

Gold & Silver

Daytime
Deliberately dark like the photographs I've taken of real coastlines, which have been under-exposed so the sea appears like oil or ink.

Dark Blue Sea
The still doesn't look very good, hence its small size, but the textures interact nicely when moving.

Underwater Sunlight
The flare streaks and halo can't be animated, so this isn't quite right.

Pale Blue Wave
Geometry displacement which loops every 200 frames (though the textures don't), but I'm not good enough to add things like spray.

Underwater Moonlight
Combining elements from the previous two scenes.

Stars

Binary Eclipse
Just using lights and sky textures in an otherwise empty scene.

'Real' Version

Alternative 1 : Shimmering Clouds

Alternative 2 : Smoke Tendril Clouds