The circular scrawling is an artifact of Poser's texture filtering of the image you're using for a bump map. I don't use images for this because Poser has trouble with maps and displacement.

I have been working all day on refining my procedural waves, so that I can give good advice about it. I've never felt I had it really right before for high-wind situations.

Here is a test render I just did.

I'm trying to get results consistent with a 45-knot wind. The waves are over 10 feet here.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)