Wow, that's a great start. Definitely has that "noisy" quality of Earth's cloud patterns, and isn't overly sharp or cartoonish, as SE's stock clouds can often look.
It does seem to lack vortices, though. I tend to think the vortices in SE at present are over-simplified.
I hope you keep working on this, because whatever you did - I think you're on to something.
When messing around with merging it with my clouds, I noticed it indeed lacked vortices. Adding my code and tweaking it seemed to bring them back.
However, adding my code also seemed to make it almost impossible to reduce the coverage levels, since I have height multiplied by 3 because I hate how shallow the standard SE clouds are, causing high coverage planets to be almost completely obscured
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