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April 24, 2010
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:iconfence-post:
This stereogram was created manually in GIMP using no special software, plugins, or filters. I'm not trying to win an art contest with this, it's just to show off my results of doing it manually.

Once I get the technique down, I'll prepare a tutorial (and probably put this deviation in scraps at that time). It's actually quite simple to do manually, but it's repetitive. The technique isn't perfect, as stereogram software has algorithms to reduce "ghosting" or "artifacts" which sometimes appear in the hidden image, making them look odd. However, it is neat to see how they are put together.

Click on the preview image to view in full size. So what do you see?
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:iconbubblecloud:
*BubbleCloud Feb 17, 2012  Hobbyist General Artist
Lovely one!! :D :heart:

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:iconmultisimsim:
~Multisimsim Feb 6, 2012  Hobbyist Digital Artist
butterfly <3 lovely

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RAWR!
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:iconmeetah12:
Mood: Wow! ~meetah12 Oct 22, 2010  Hobbyist Photographer
Really nice betterfly!
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:iconmacspeedracer:
~MacSpeedRacer Aug 5, 2010
I'd like the tut, as well! I think these are amazing, and I can't figure out how you did it without rendering software... Amazing!
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:iconawsomeking14000:
~Awsomeking14000 May 24, 2010
Nice butterfly.

--
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:icon3dimka:
~3Dimka Apr 25, 2010
Displacement map in several iterations?

Looks pretty good except for the ghosts you already mentioned.

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Stereograms are good for your eyes - [link] - got headache?
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:iconfence-post:
~fence-post Apr 26, 2010
It was done with displacement maps! I have a very curious nature and love figuring out how this stuff works. Maybe one day I'll actually understand how the math works. But, until that time, it's been fun working through it manually.

The ghosts are definitely there and I may never get rid of them by doing the steps manually, but like I said, this has been a fun process.

BTW, I don't participate on the Yahoo Stereogram forum, but I do get the email updates and you guys are putting out some great work!

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:icon3dimka:
~3Dimka Apr 29, 2010
It's very cool that you figured this out!

The math is fairly simple in fact, and if you are interested here is a great link - [link]

Also displacement map method also doesn't really allow to render from center.

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Stereograms are good for your eyes - [link] - got headache?
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:iconfence-post:
~fence-post Apr 30, 2010
Thanks for the link! I'll check it out. Math isn't my strong suit, but I'll see how it goes.

Actually you can create them from a center strip; I stumbled on the method by accident. The artifacts are still present, but you can do it. Here's one created with that method....[link]

Pretty neat, eh? :)

--
Yes, Art is my real name!

"I don't know about genius, I'd more say it was stupidity let loose...." Siminart

GIMP Dome ; Need Gimp Brushes? Check Here!
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:icon3dimka:
~3Dimka May 1, 2010
I see, very nice! In Photoshop displacement map is going in one direction (as far as I know). Probably mirroring the images after each iteration would do the trick. Still not clear how to eliminate ghosting.

--
Stereograms are good for your eyes - [link] - got headache?
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