# Optical illusion for those on a diet

28

This is doing the rounds at the minute, and is very well done….

Can you figure it out?

## 28 comments on “Optical illusion for those on a diet”

1. Anonymous says:

Fukien prik

2. Hi Richard. When i saw this the first time a few weeks ago I created this “augmented” version to expose the trick: http://goo.gl/Unueo

Nicely done, Benjamin. Thank you.

• Eddie says:

If the pieces were stretched, why do they still look the same size?

• You are right Eddie! Stretching is not the right word, “expanding” or “growing” would be better. Watch the moment when I replace the expanded pieces with the real ones, you’ll see how they were expanded along the diagonal.

• +1 for Benjamin.

• Eddie says:

I see. You’re just infilling a strip equivalent to one rectangle.

• What I did was creating an exact border around the pieces in the first animation-frame where they separate. From then on I had those borders move along without changing them again. The strip results from the difference in height after replacing the manipulated pieces (extended downwards) with the original pieces. If that is precisely the area of one brick I haven’t checked but assume that is the case.

• Ken Haley says:

Very nice, Benjamin. Your animation also exposes how the pieces are stretched *gradually* as they move (instead of all at once just before the re-attach, as I had thought).

• Anonymous says:

excellent benjamin

3. Eddie says:

What a subtle puzzle!

• Anonymous says:

Sweet!

• ctj says:

much, much better than the .gif, which is a cheat. although the odd sizes of the rectangles are hard to miss.

4. One Eyed Jack says:

Are we supposed to be impressed by this? It’s a cheat. An illusion should play on you perceptions, not change the figures while moving them about. Color me disappointed.

5. Dharmaruci says:

wow, this is a solution for World Hunger and could also help NASA and astronauts on long voyages to Mars (pun intended). i think there are two problems to solve first

1. will this work with foods that are more nutritionally balance and wholesome that chocolate?

2. is the energy needed to cut and shuffle less than that to create a square of the food by more traditional means.

at last the 21st century is beginning to make sense!

6. Martha says:

Are the pieces at the bottom smaller than the top, then?

7. This is making me feel very stupid! I can see how the stretching creates a strip equivalent in volume to one of the pieces of chocolate, but I don’t understand how it turns into a rectangle. It’s probably obvious, but I don’t get it.

8. Patrick says:

This one’s nice because he manages to take three pieces out:
http://www.moillusions.com/2013/04/video-missing-cubes-optical-illusion.html

9. Reblogged this on Illuminutti.

10. […] Optical illusion for those on a diet – Fun video for chocolate lovers on a diet. […]

11. Xserd says:

Interesting! you really had me thinking lol.

12. Thus, from the last many decades, Jungheinrich forklift trucks
are highly popular in the market. Also, while operating the machine, care should
be taken not to apply sudden brakes. The European mechanical testing and
European handling equipment market will grow at a healthy rate.

13. I do not even know how I ended up here, however I thought this put up used to be great. I do not know who you’re however definitely you are going to a well-known blogger in case you aren’t already. Cheers!|

14. Isa M. says:

This Russian artist turned these models faces into optical illusions. What do you think of them?
http://www.qltyctrl.com/model-faces-optical-illusions/