Thanks for the info greg,no i had not seen robs post so much appreciated,yes there are many ways to skin a cat .
Thanks again
Quote:
Originally Posted by gregbradley
Hi Rob,
Here is a recent post by Rob Gendler which you may have already read on the SBig group but he mentions an approach to combining Ha that could be useful:
"You can layer over an RGB (or LRGB) version
over the high S/N regions. Alternatively what I've done more recently
is layer over traditional (or enhanced) RGB data over the h-alpha
composite using color mode. By doing this I've been able to restore
much of the vibrancy and range of the RGB to the h-alpha composite.
Rob Gendler."
I personally also find adding some O111 also adds vibrancy and glow to nebulas. I have ended up doing multiple layers of Ha as red, Ha as luminance and various blend modes - usually "screen" for red and luminosity for Ha as luminance. Then use the opacity sliders to suit the image. It is a tricky process hence my interest in Rob's post. The usual thing is for the stars to go a bit green and lose their colour (I think he and Russell Croman etc process the stars separately). Also the reds tend to be a bit salmon in colour. Doing 2 layers of Ha assigned to the red channel can deepen the red and also a bit more Ha as luminosity weakens the colour so you can fiddle with it until you get the effect you want.
Greg.
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