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Increasing Color Bit Depth on Legacy files -- Does it have any immediate effect?

Oct 27, 2018, 18:28
Post: #1
Increasing Color Bit Depth on Legacy files -- Does it have any immediate effect?
Howdy folks,

Posted this on the subreddit too; sorry if you use both forums, but I'm trying to get an answer quickly as I need to finish what I'm working on.

Currently still on some older version of GIMP -- a late 2.8 or early 2.9. Not sure which specifically and I don't feel like starting another instance of the program because my computer is really bogged down with the active project. I intend to update once I'm done with my current projects.

Anway, with the increase of color bit depth options, I chose to convert a file from 8 bit color depth (yeah, I know 16 was an option too -- I only realized the option existed a month or so ago) to 32 in the hope of ironing out some color grading issues that I had with a project that still hasn't been released. In short, this image uses a lot of radial gradients with different layer modes. I noticed while making it that once I stacked enough gradients, I could actually see seams between each level of the stacked gradients as they faded to the edges. To my understanding, a higher bit depth workflow would eliminate this.

Much to my surprise, however, once I converted to 32 bit I had trouble seeing the seams. Granted, it has been a while since I've looked at it, but....it actually looks different now? Nobody else would know if they hadn't been as hands-on with it as I have been, but I feel like I'm noticing just slightly more dynamic. And I'm really having trouble finding those seams in the stacked gradients now.

The conversion to a higher bit depth isn't something I expected to have an active effect on the image, but now that I think about it that may have been why it took so long to convert (the image has a lot of layers and is for print -- I removed all the unnecessary layers and my file size is still around 17 GB.) If it were just an internal restructuring, it wouldn't have to redraw every layer as 8 bit depth is contained within 32. ...right?

TLDR: Will a conversion to a higher bit depth also do some "smoothing" of some sort? It looks like it did, and I feel like I'm crazy.
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Oct 27, 2018, 21:15
Post: #2
RE: Increasing Color Bit Depth on Legacy files -- Does it have any immediate effect?
Why is it not obvious that this forum is had been DEAD for a long time?

The spammers keep trying to take over.

Save yourself from them and go to https://www.gimp-forum.net instead
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Oct 29, 2018, 17:41
Post: #3
RE: Increasing Color Bit Depth on Legacy files -- Does it have any immediate effect?
(Oct 27, 2018 21:15)paynekj Wrote:  Why is it not obvious that this forum is had been DEAD for a long time?

The spammers keep trying to take over.

Save yourself from them and go to https://www.gimp-forum.net instead

Geez dude, its not like I scour a forum when I'm just trying to ask a question. When I posted over 50% of the subforums had a thread that had been updated within the past week, and the majority of others a couple weeks.

Thanks.... I guess....but I don't see why we have to be intense about someone literally just taking advantage of a potential informational resource.
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