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Advice on processing in HOO


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I want to dabble with HOO but I'm unsure how to create the data for the green channel

I've read that you assign Ha to red, OIII to blue and a mix of Ha and OIII, but what does mixing Ha and OIII mean in practice? Do you stack them together or perhaps somehow process them together after stacking?

I use DSS, Siril and Gimp for processing, in case that's relevant.

TIA for any guidance.

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I usually start off by mapping 100% Ha to red, and 100%Oiii each to Blue and Green, then experimenting by say adding 20% Ha 80% Oiii to the green or blue, seeing what I get, adjust the ratio maybe 10% Ha or 50%. At the end of the day, the amount of Ha you add in to either the blue or green channel is personal taste. 

Depending on the amount you add you can get an RGB type look (straight 100% Oiii in both green and blue), but you can also get a Hubble type look by adding in Ha to the green I think. 

For me personally, I try these experiments but usually end up finding that 100% Oiii in green and blue works best for me

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18 hours ago, Adam1234 said:

I usually start off by mapping 100% Ha to red, and 100%Oiii each to Blue and Green, then experimenting by say adding 20% Ha 80% Oiii to the green or blue, seeing what I get, adjust the ratio maybe 10% Ha or 50%. At the end of the day, the amount of Ha you add in to either the blue or green channel is personal taste. 

Depending on the amount you add you can get an RGB type look (straight 100% Oiii in both green and blue), but you can also get a Hubble type look by adding in Ha to the green I think. 

For me personally, I try these experiments but usually end up finding that 100% Oiii in green and blue works best for me

Super! Thank you. I will try that out.

But first I have to fix a problem with stacking that has left some weird patterns.... we AP'ers are gluttons for punishment!

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1 hour ago, Mr Thingy said:

Super! Thank you. I will try that out.

But first I have to fix a problem with stacking that has left some weird patterns.... we AP'ers are gluttons for punishment!

No problem! What are the weird patterns?

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