Optic Illusion press kit
Contact: John Haney — john@appsfromouterspace.com
Fact sheet
| App | Optic Illusion — Classic illusions, built and explained. |
|---|---|
| What it is | Optic Illusion is a small museum of visual perception — classic illusions, built and explained. Seven of them, each rendered from its real geometry rather than reproduced as a picture. |
| Category | Entertainment |
| Price | Free. No in-app purchases, no subscription, no ads. |
| Platforms | iPhone, iPad and Mac |
| Requirements | iOS 26, iPadOS 26 or macOS 26 |
| Privacy | No accounts, no analytics, no tracking, no third-party SDKs — and the Mac build ships without the network entitlement, so it cannot reach the network at all |
| App Store | https://apps.apple.com/app/id6797143310 |
| App page | https://appsfromouterspace.com/apps/optic-illusion/ |
| Developer | Apps From Outer Space, LLC — one-person studio, St. Louis, Missouri |
About Optic Illusion
Optic Illusion is a small museum of visual perception: seven classic illusions, each rendered from its real geometry rather than reproduced as a flat picture, and each paired with a plain-language account of the neuroscience behind it. Free, with no in-app purchases, no ads and no analytics, for iPhone, iPad and Mac.
Most illusion apps ship a folder of JPEGs. This one computes. The Penrose triangle is not a drawing of an impossible object — it is a truthful orthographic render of three real rectangular beams laid out as an open staircase in 3D, viewed down the single axis where the far end of the last beam projects onto the near end of the first. Every corner is an unremarkable right angle. Turn the camera a few degrees, which the app lets you do, and the figure springs open into the staircase it always was. The impossibility was never in the object; it was in the viewpoint, and in the assumption you never noticed making.
That distinction runs through the whole app. Each exhibit states a flat claim up front — "Every horizontal line is perfectly parallel," "The two shafts are exactly the same length," "Nothing in this image is moving" — and then explains, in a paragraph you can actually follow, which piece of your visual system is responsible. Lateral inhibition in the retina. The poor temporal resolution of peripheral vision. Local orientation detectors at tile corners. A probabilistic depth guess that never settles.
Key features
- Seven classic illusions, sorted into four categories — Motion, Contrast, Geometry, and Depth.
- Real geometry, not images. The Penrose triangle is a genuine 3D construction rendered from the one camera angle that lies. Nothing is faked, retouched, or pre-baked.
- Turn the camera. Switch the Penrose triangle out of its impossible viewpoint and watch the illusion disassemble itself into three ordinary beams.
- Bias your own perception. The Necker cube offers to push you toward one reading or the other — then you get to feel your visual system disagree.
- An explanation for every exhibit, written for a curious adult and legible to a curious kid. The mechanism, not just the party trick.
- No network, no accounts, no analytics. The app makes no network calls of any kind and stores nothing about you.
Quotes — attributable to John Haney
"Every other illusion app is a folder of JPEGs. I wanted the Penrose triangle to actually be three real beams, so you can turn the camera and watch the impossibility fall apart. The lie is the viewpoint, not the object."
"The illusion is only half the fun. The other half is finding out which specific part of your retina is responsible for it, and that's the part nobody bothers to write down."
"Knowing exactly how the trick works has never once stopped it from working. That's the part I find genuinely strange — you can read the explanation, understand every step of it, look back at the picture, and your visual system carries on lying to you."
Q&A
How many illusions are there? Seven at launch: Rotating Snakes, Hermann Grid, Scintillating Grid, Café Wall, Müller-Lyer, Necker Cube, and the Penrose Triangle.
Is the Penrose triangle really 3D? Yes. Three rectangular beams are positioned as an open right-angled staircase — one along each axis — and rendered orthographically down the (1,1,1) axis, where a step of (t,t,t) projects to nothing at all. That is why the gap closes on screen. The app will turn the camera off that axis on request and show you the gap.
Does it collect any data? No. There is no networking code in the app, no accounts, no analytics SDK, and no persistence. The privacy label is "Data Not Collected" because there is nothing to declare. The Mac build goes one step further: it is sandboxed with the outgoing-network entitlement switched off, so it is not merely that the app does not phone home — it could not if it tried. The only URL anywhere in the app is a link to the developer's App Store page, which hands off to Safari.
Is it safe for people sensitive to flicker? The Scintillating Grid, Rotating Snakes, and Café Wall are high-contrast repeating patterns, which some people find uncomfortable. Nothing in the app flashes or strobes, and the "motion" illusions are entirely static images — but anyone with pattern sensitivity should know what they are looking at going in.
Is there a Vision Pro version? Not in this release. The illusions are built as real geometry rather than flat images, so the groundwork is there, but visionOS is not part of this launch.
Who made it? John Haney, Apps From Outer Space LLC. He shipped one of the original App Store apps in 2008.
Images
Every image below links to its full-resolution file — save any of them individually, or download everything as a zip. Screenshots are raw device captures with no frames or captions.
App icon — 512×512 PNG. The zip includes 512 and 256 renditions.
Contact
John Haney — john@appsfromouterspace.com