Chicago Boyz

What Are Chicago Boyz Readers Reading?

  •   Enter your email to be notified of new posts:
  •   Problem? Question?
  •   Contact Authors:

  • CB Twitter Feed
  • Blog Posts (RSS 2.0)
  • Blog Posts (Atom 0.3)
  • Incoming Links
  • Recent Comments

    • Loading...
  • Authors

  • Notable Discussions

  • Recent Posts

  • Blogroll

  • Categories

  • Archives

  • Posted by TM Lutas on August 24th, 2019 (All posts by )

    Sometimes your eyes can trick you.

    HT: Political Calculations


    7 Responses to “”

    1. david drake Says:

      Watched that clip about 8 times trying not to see the optical illusion. Didn’t work. Is it the slight difference in lighting perceived by the eye that allows the brain interpreting the two ends appearing shaped differently?

    2. MCS Says:

      The part that I can almost understand is that it is shaped like a propeller. The viewpoint is chosen so that our line of sight is nearly parallel to the left side and more perpendicular to the right side. The facets you can see seem to produce the effect in reverse. It’s interesting that the effect holds up in the mirror, I wonder how far you could raise and lower the viewpoint before it broke down.

    3. Grurray Says:

      This reminds me of the this is true/truth meme. A play on the Platonic shadows on the cave wall.

    4. Assistant Village Idiot Says:

      The facets are the key, as this would work with various light arrangements. Facets hide or expose parts of the figure behind them. They are tilted differently.

      Part of this is our brain interpreting, of course. Our brains learn what arrangements of reflected light usually mean – and by usually, I mean over 99% – and so we automatically respond that’s what it “is.” Because it works, and it kept us from getting eaten by tigers back in the day. But everything is shortcuts in the brain, including sight, so sometimes there are ambiguities.

      If you study perception, you will find it fascinating but frustrating. I gave it up as a topic to pursue after the 20th time of thinking I finally understood it, only to learn I really hadn’t. The military has really wild information on this as they try to make things disappear from detection.

    5. OBloodyHell Says:

      Not an optical illusion, but an exercise in maximum frustration….

    6. OBloodyHell Says:


      You might find this of interest, if you did not already know of it.

      The idea isn’t so much to hide but to make rangefinding and distance/speed estimation difficult.

    7. Grurray Says:

      A great book from last year that covers the history of optics in warfare including camouflage is The Eye of War: Military Perception from the Telescope to the Drone.

      Surveillance and imaging and targeting are now so good at creating the so-called non-permissive battlespace, that fighting on open terrain is at a stalemate. It pushed war into the shadows, tunnels, alleys, sniper nests, IED potholes, etc. one end, and into swarms of ‘little green men’, drones, bots, and cyber-viruses on the other end.

    Leave a Reply

    Comments Policy:  By commenting here you acknowledge that you have read the Chicago Boyz blog Comments Policy, which is posted under the comment entry box below, and agree to its terms.

    A real-time preview of your comment will appear under the comment entry box below.

    Comments Policy

    Chicago Boyz values reader contributions and invites you to comment as long as you accept a few stipulations:

    1) Chicago Boyz authors tend to share a broad outlook on issues but there is no party or company line. Each of us decides what to write and how to respond to comments on his own posts. Occasionally one or another of us will delete a comment as off-topic, excessively rude or otherwise unproductive. You may think that we deleted your comment unjustly, and you may be right, but it is usually best if you can accept it and move on.

    2) If you post a comment and it doesn't show up it was probably blocked by our spam filter. We batch-delete spam comments, typically in the morning. If you email us promptly at we may be able to retrieve and publish your comment.

    3) You may use common HTML tags (italic, bold, etc.). Please use the "href" tag to post long URLs. The spam filter tends to block comments that contain multiple URLs. If you want to post multiple URLs you should either spread them across multiple comments or email us so that we can make sure that your comment gets posted.

    4) This blog is private property. The First Amendment does not apply. We have no obligation to publish your comments, follow your instructions or indulge your arguments. If you are unwilling to operate within these loose constraints you should probably start your own blog and leave us alone.

    5) Comments made on the Chicago Boyz blog are solely the responsibility of the commenter. No comment on any post on Chicago Boyz is to be taken as a statement from or by any contributor to Chicago Boyz, the Chicago Boyz blog, its administrators or owners. Chicago Boyz and its contributors, administrators and owners, by permitting comments, do not thereby endorse any claim or opinion or statement made by any commenter, nor do they represent that any claim or statement made in any comment is true. Further, Chicago Boyz and its contributors, administrators and owners expressly reject and disclaim any association with any comment which suggests any threat of bodily harm to any person, including without limitation any elected official.

    6) Commenters may not post content that infringes intellectual property rights. Comments that violate this rule are subject to deletion or editing to remove the infringing content. Commenters who repeatedly violate this rule may be banned from further commenting on Chicago Boyz. See our DMCA policy for more information.