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The reprocessed image is really lovely. In comparing the light I get on my mono images, the green and blue filters predominate near the centers of nebulae where you would expect excitement of Hydrogen at the beta wavelengths plus some blue reflection depending on the nebula. Further out, red predominates giving way to the ultra red Ha which picks up just about all the visible features because its emitting everywhere. Yes Ha is deep deep red but rendering it that way 'looks' bizarre and also loses all the beautiful luminance it can provide so it seems that most of our ha rendering is a compromise between colour and luminance. Rob, I think you are right that in terms of 'real colour' a neutral image is probably closer to being correct as our eye isn't selective for 656.2 nm.
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