# What's the name of that 3d thing where you cross your eyes

**URL:** <https://forum.kirupa.com/t/whats-the-name-of-that-3d-thing-where-you-cross-your-eyes/308004>\
**Category:** Uncategorized\
**Created:** [April 14, 2010, 11:55pm UTC](https://forum.kirupa.com/t/whats-the-name-of-that-3d-thing-where-you-cross-your-eyes/308004 "2010-04-14T23:55:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![IQAndreas](https://avatars.discourse-cdn.com/v4/letter/i/f08c70/32.png) [@IQAndreas](https://forum.kirupa.com/u/IQAndreas)\
**Post date:** [April 14, 2010, 11:55pm UTC](https://forum.kirupa.com/t/whats-the-name-of-that-3d-thing-where-you-cross-your-eyes/308004/1 "2010-04-14T23:55:34Z")

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I can’t think of the name (in fact, I’m not sure if it has a name).

**You know those 3d things where if you have a tiled background, and then you sortof cross your eyes, and you see the 3d in it?** Ususally, there are books with 25 or so pages of those in them, and after you are done, your eyes sometimes feel funny from staring so strangely for too long. 😃

I have a sortof idea in my mind how it works, and I tried creating something like that in ActionScript using a DisplacementMapFilter, and it didn’t turn out as simple and elegant as I thought it would. :trout: In fact, it was a catastrophic failure.

So if I can get the name of that 3d thing, I can likely find out how it works exactly, and see if I can get a prototype working.