Following my heart attack I have been taking it easy and learning new techniques in Blender, and other packages.
Although I have been delayed in revealing Cog I have been going back to some of those nagging problems, like wave crests, that are so difficult to do in 3D (real-time fluid dynamics in version 34.2 of Blender?). I have uploaded a resent example of progress which is definitely worth pursuing. This utilizes both displacement, and Blender waves as well as manipulated procedural textures to give crests to the waves.
At the moment there are too many crests and I need to work on a way to reduce these on less active wave heights. Anyway, I am pleased to be back in circulation following my unexpected illness.