Gail Shaw wrote:
> 
> And version 3. It's amazing what a little
> turbulence does.
> 
> I'm also working on a red and yellow aurora, but it doesn't
> look so good.
> 
> Comments?

Now you're getting somewhere. I've been working with norhtern lights
infotainment for about 6 years, and I also grew up in an area where
northern lights where more the rule than the exception during cold
winter nights. 

One thing to remember about aurora is that it is almost always curling
across the sky, not in one sheet, but in curls as seen in many of the
pictures of actual auroras in this thread.

If you want to add yellow or red, it should be very subtle and at the
higher reaches of the aurora. It is very rarely seen, and it's almost
always overpowered by the green in the aurora.

The green in the aurora is also very light green, not as saturated green
as you have it. If you notice the images posted by Jari Juslin you can
see that the aurora is curling across the sky, and that the color is
dense at the bottom of the aurora almost greenish white, and it fades to
almost translucent towards the top. You will also notice that the aurora
is almost whiteish green at the bottom and the green is getting more
saturated at the top.

I've seen auroras with orange, blue and yellow colors, but always
intermixed with the ever present green.

Oh, well, I am rambling here. What I am saying is that it's close, but
no cigar yet. ;-) Keep working on it though!

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