As a follow up to the Ha Eta from last week, I've added RGB data collected the following night.. It took me quite some time to figure out how to combine it properly, and im still not sure about the color... but its nice to look at in my opinion, whether its technically correct or not..
over all this shot is 12x600sec RGB, and 12x600 + 2x1200 Ha
Looks pretty good to me, Alex, but some of the layer masking you've done on the Humunculus is off - the colour is completely different.
Why Ha:Ha+R:G:B?
When combining Luminance (Ha) with an RGB, it's as simple as leaving one layer as "normal" and the other layer above as "Colour" or "Luminance" (depending on which you use as the base layer).
It's easiest to use the Luminance as the base layer, blend mode normal, and then the RGB as the layer above and use "Colour" as the blending mode. Obviously the layers have the be aligned. You may then need to use some additional adjustment layers to colour balance the result to taste.
I really like the Ha RGB version. Although you may feel that you are loosing some nebular detail, The star colours and contrast feels better in the second version, (well at least to me). I look at star colours to help me try and get the colour balance right, a balance of blue white red and yellow. (Probably trying to teach you to suck eggs here as your pics are better than mine).
all info given to me is taken on board mate... It makes good sense... I think its fair to say that this is still a work in progress... but the final version is nearing
all info given to me is taken on board mate... It makes good sense... I think its fair to say that this is still a work in progress... but the final version is nearing 
Nice work.
