What happens when I select an example?

Preset examples open the detector with the matching preset. Image examples can be opened from the gallery and compared in the detector.

Preset library

Impossible shape gallery

Q: What assets are in the impossible shape gallery?

The gallery contains curated SVG and PNG examples with source notes. Except for the visible-edge cube and box baselines, every gallery item is treated as an impossible-object reference.

Browse curated impossible-shape examples, then open any item in the detector. The library includes triangles, blivets, impossible cubes, Penrose stairs, squares, frames, stars, patterns, symbolic shapes, and baseline possible solids. Except for the visible-edge cube and box baselines, gallery examples are expected to analyze as impossible.

25 examples SVG and PNG assets Source notes included Last reviewed 2026-06-23

What you can try

Start with a clean Penrose triangle or impossible trident, then compare it with cube and box baselines. Gallery examples are meant for visual exploration, not formal proof.

Open the FreeSVG public-domain source example

How to use the gallery

Pick an example, open it in the detector, and compare the verdict reasons with what your eye sees: prong conflicts, depth loops, strange boxes, or ambiguous shaded artwork.

Analyze examples

Select a shape

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License standard

Gallery examples are selected from permissive public sources or original site artwork. Source notes are shown so visitors can understand where an example came from.