Mark Metternich
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aFeinberg wrote:
Looking good to me. Will have to talk story with you concerning the 8bit issue. Nice work sir 
aF
After talking with a couple Adobe folks I am a little bit less convinced that the 8 bit selection issue is as bad as previously thought (yet I still believe making custom 16 bit masks is a good idea if one is going to make substantial adjustments and also makes a lot of enlargements). I put a comment on Tony Kuypers blog about it, but it has been "awaiting moderation" for almost 2 weeks now:
Hi Tony.
Thank you very much for this article/blog post and helping to clear the air about “8 bit – live selections” and how they may or may not effect 16 bit data. I very much appreciate it being addressed head on. Many years ago I used to use a variety of custom luminosity masks, a lot of which were based on 8 bit live – “dancing ants” – selections. Then I quit about 6-7 years ago because of feedback I got from some guru types I relied heavily on for information. What I started to do was use more custom 16 bit masks and of course the Layer Style “Blend if” options I currently teach in my video tutorials. Currently, I am doing a lot of digging and research about the inner workings of PS and it is sometimes challenging to say the least. I am finding that it might not have been adjustments to marching ant “live selections” that caused the issue of posterization in both mine and some of my clients 16 bit enlargements. Although still uncertain, it could have been caused by a number of things including adjusting the actual selection itself (as one example, “refine edge”) before making an adjustment to the actual pixel data. I am still NOT sure yet of the specific culprit or culprits that caused the real world degrading. Looks like, years ago, I may have gotten bad info about adjusting 8 bit, live selections and how it effects the 16 bit data. But the posterization was unequivocally there for years (on some, but not all of the images) and now (after weaning off of 8 bit selection use) it isn’t (in both my own work and some of my clients). So, as an educator myself, I really need to get to the bottom of what has been the destructive components in workflow. When I figure those out with certainty, I will let everyone know. Anyways, thank you for your patience. If my information previously given was based on misconception (about how 8 bit selections effect 16 bit data) I apologize. Your inner workings of Photoshop and some of your tutorials over the years have been a huge inspiration to me.
Tony's Blog
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